TK913 GPS Tracker – Technical Overview

The TK913 is a compact and lightweight GPS tracking device, available in both 2G and 4G versions. It features a built-in rechargeable 1500 mAh lithium battery, a SIM card slot, USB charging port, and a LED indicator for status updates. The 4G model also includes a physical power button.

The tracker provides good autonomy (up to 15 days in standby), GPS accuracy up to 5 meters, and can be operated via SMS commands or through an app. It is suitable for tracking cars, motorcycles, luggage, or individuals.

Note on the default password for App as  TKSTAR, Winnes, or MyTKStar.

On newer models, the default password may not be 123456, but instead the last 4 digits of the device’s ID number (printed on the label). Be sure to verify the correct password before sending commands.

Key Features

• Real-time tracking via SMS, GPRS, or mobile app.

• Supports 4G LTE networks, with 2G/3G compatibility.

• Built-in rechargeable battery (approx. 1500 mAh).

• Alarm modes for movement, vibration, overspeed, and low battery.

• Configurable geo-fencing alerts.

• Integrated magnet for easy mounting on vehicles or metal surfaces.

• Compatible with apps like TKSTAR, Winnes, or MyTKStar.

• Standby time ranges from 3 to 25 days depending on usage and settings.

Advantages

• Accurate positioning: location accuracy typically between 5 and 10 meters.

• Easy to install: no wiring required thanks to the built-in battery and magnet.

• Good battery life: can last more than two weeks in sleep mode.

• Wide network support: works on modern and legacy networks.

• Affordable: offers many features for a low price.

Disadvantages

• High battery consumption in active mode: without proper sleep settings, the battery may last only a few days.

• Sleep mode instability: in some cases, the device does not automatically switch to power-saving mode.

• Notification delays via app: alerts may sometimes arrive with a delay depending on network conditions.

• Non-intuitive apps: the official apps often lack localization and may be difficult to use.

• Lack of clear documentation: users often report incomplete or unclear instructions in the box.

SMS Commands for TK913 GPS Tracker

Note: On some newer models, the default password may not be 123456, but instead the last 4 digits of the tracker’s ID number (usually printed on the label). Always check your device documentation.

Below is a list of the main SMS commands you can send to the TK913 to configure and control it remotely:

Conclusion

The TK913 is a useful, compact, and feature-rich device ideal for users looking for a simple yet effective GPS tracking solution without high costs. It works well for both personal use (cars, bikes, kids, pets) and business applications (fleet tracking, logistics, security). 

High-Quality AI Video Generator Cost Comparison (5-second clips)

Key Takeaways

• ✅ Best for 1080p value:

Kling 1.6 delivers the most 1080p videos at the lowest price (~$0.17/video), with impressive visual quality.

• Best cinematic quality:

Kling 2.0 Master and Google Veo 2 are premium choices for film-grade results but come at significantly higher costs.

• Best balance:

Runway Gen-3 Alpha strikes a great compromise with high-quality 1080p videos at ~$0.31/clip, ideal for creators on a budget.

• Resolution limit:

Pika Labs doesn’t support 1080p but remains useful for stylized or vertical formats (e.g., TikTok).

PixVerse handles 1080p affordably, though its realism doesn’t match Kling or Runway for facial consistency or motion accuracy.

AI video generators. Cost comparison for low-resolution videos (5 seconds)

Here is a more detailed explanation of the key observations relating to the comparison between the main AI video generators of 2025, considering in particular low resolution (360p-540p) and cost per video:

PixVerse 4.5: The most affordable for low-resolution videos

PixVerse 4.5 stands out as the cheapest option for generating a large volume of standard-resolution videos. At just 20 credits per 360p clip and with 6,000 credits per month for $30, you can generate up to 300 five-second videos.
It’s designed to be fast and user-friendly, producing good results especially in cartoon, anime, and stylized formats. While there can be some facial distortions in complex prompts, it’s perfect for TikTok, Instagram, YouTube Shorts, or bulk content creation.

Kling 1.6: A balanced choice between quality and cost

Kling 1.6 allows you to create realistic 720p–1080p videos for just 20 credits per 5 seconds, making it very cost-effective (~$0.17 per video).
Although it lacks the advanced features of Kling 2.0 Master (like camera path control or ultra-smooth motion), it still delivers solid photo-realism and natural movement at a competitive price.
It’s ideal for users who want high quality without the high cost.

Kling 2.0 Master: Maximum visual quality, but high cost

Kling 2.0 Master is aimed at cinematic or professional productions. It uses a 3D spatiotemporal attention model to create extremely realistic movement, facial expressions, and faithful prompt interpretation.
However, each video costs 100 credits, which limits users to only 30 clips per month on the Pro plan.
This is the best choice if visual quality is the top priority, but it's not suitable for mass production due to the high cost per clip.

Runway Gen-3 Alpha: Great balance between quality and cost

Runway offers a Turbo mode that allows you to generate 1080p videos with excellent consistency in lighting, detail, and camera motion.
At ~25 credits per 5-second clip, and with 2,250 credits for $28, you can produce around 90 videos per month. That’s fewer than PixVerse, but the visual quality is noticeably higher.
It’s a great option if you want professional-level output without breaking the bank.

Pika Labs: High flexibility, simpler visuals

Pika Labs is well-regarded for its intuitive interface and support for diverse inputs (text, image, audio), generating videos up to 720p.
Cost per clip varies widely (5–10 credits per second), so a 5-second video may cost 50 credits ($0.44).
While suitable for stylized or animated content, it doesn’t reach the visual precision of Kling or Runway.
It’s a good fit for users seeking creativity and speed over realism.

Google Veo 2: Premium quality, professional pricing

Google Veo 2 (still in limited-access) aims to deliver 4K cinematic videos with outstanding detail and realism.
At $0.50 per second, that’s $2.50 for 5 seconds — much higher than competitors.
It’s clearly intended for advertising, film, or high-end creative work, not for daily or bulk content.

In other words: what can happen when my cat sees something really interesting below the water level and decides it’s time to go check it out.

Cats have an excellent sense of balance, but...

Why did I leave the camera by the pool?

A wet episode on YouTube

I’ve used Canon for many years, and it has given me amazing photos.

When even Canon needs a relaxing break! Here’s the camera preparing to become the new drink of the moment: a delightful infusion of technology and creativity!

Warning: Don’t try this at home! Cameras are not suitable for infusions and tea. The risk of taking watered-down photos is too high!

Here are the top 5 models (without lenses and accessories) of video cameras among the most expensive on the market. Note: The entries from Phase One and Hasselblad, more than video cameras, are extraordinary medium-format cameras mainly designed for photography; however, for consistency with the "5 most expensive" ranking, we include them here. Prices are indicative and may vary depending on the retailer and country.

1. ARRI ALEXA LF
   Indicative price: ~98,000 USD

Description:
The ALEXA LF is an icon of high-end digital cinema. Used in many Hollywood productions, it boasts unparalleled image quality and build robustness, specifically designed for the professional movie set.

10 Features:

• Sensor type: Large Format (Full-Frame) ARRI ALEV III 36.70 mm x 25.54 mm (1.445 in x 1.005 in)
• Maximum recording resolution: Up to 4.5K native  4448 x 309    13,8 megapixels
• Recording formats: ARRIRAW, ProRes (various formats and bitrates)
• Dynamic range: About 14+ stops
• Frame rate: Supports up to 90 fps (depending on the format)
• Lens mount: LPL (with PL adapters available)
• Weight (body only): Around 7.2 kg
• Build: Durable body for heavy use on film sets
• Mounting: Compatible with a wide range of professional rigs
• Intended use: High-end film productions

Pros:

• Industry-leading image quality
• Wide dynamic range for high latitude in exposure
• Exceptional reliability, even in extreme conditions

Cons:

• Extremely high price
• Significant weight, requiring robust support equipment
• Menu and functions designed for professionals, not amateurs

2. Sony VENICE 2
   Indicative price: ~60,000 USD

Description:
The Sony VENICE 2 is the flagship model in Sony's cinematic line. It offers a high-quality full-frame sensor, great flexibility in recording formats, and a modular design that easily adapts to different productions, from films to commercials.

10 Features:

• Sensor type: 35 mm Full-Frame (up to 8.6K, depending on configuration)
• Maximum recording resolution: Up to 8K    50 megapixels
• Recording formats: X-OCN, ProRes, RAW (with external recorder), and others
• Dynamic range: About 15+ stops
• Frame rate: Up to 90 fps in 6K; variable values depending on format
• Lens mount: E-mount (with optional PL adapters)
• Weight (body only): Around 2.4 kg
• Cooling system: Optimized ventilation for long shooting sessions
• Interchangeable sensor module: Ability to replace the sensor with different units
• Color science: Customizable S-Log3 color profile and Looks

Pros:

• High image quality with wide dynamic range
• Flexible recording formats, ideal for various workflows
• Relatively lighter and more compact than other high-end video cameras

Cons:

• Still very high price for smaller studios or individual operators
• Requires a professional accessory ecosystem (monitors, rigs, etc.)
• Some advanced features require optional modules not included

3. Phase One XF IQ4 150MP
   Indicative price: 50,000–55,000 USD

Description:
The XF IQ4 150MP is a medium-format camera that leads the ultra-high-end professional photography sector. Although it is not designed as a video camera, we include it for completeness: its resolution and dynamic range make it the “Holy Grail” for fashion, advertising, and art photographers.

10 Features:

• Sensor type: Medium format (about 54x40mm) 151 megapixels
• Resolution: 151 megapixels fixed, 14204 × 10652 pixel, theoretically 13.9K
• Connection: XF camera system with digital back IQ4
• Weight (body + back): Around 1.8 kg
• Dynamic range: Up to 15 stops in photography mode
• Interface: High-resolution touch rear screen
• AF system: Contrast-detection autofocus enhanced for medium format
• Connectivity: Ethernet, USB-C, Wi-Fi
• Build: High-quality aluminum and magnesium alloys
• Lens system: Dedicated Schneider Kreuznach lenses

Pros:

• Unmatched photographic resolution
• Exceptional image quality, ideal for very large prints
• Excellent software support (Capture One) for post-production

Cons:

• Not a video camera in the traditional sense (limited or no video recording)
• Large size and weight for a medium-format setup
• Extremely high price, aimed at a niche professional market

4. Hasselblad H6D-400c MS
   Indicative price: ~48,000 USD

Description:
Another super-premium medium-format camera, the H6D-400c MS (Multi-Shot) stands out for its function of combining multiple shots to achieve incredible detail and color accuracy. It is a gem for still life, product, and architecture photographers.

10 Features:

• Sensor type: Medium format 100 MP (multi-shot up to 400 MP theoretical) 53.4 x 40.0 mm
• Resolution: 100 megapixels single shot, up to 400 MP combined. 4 K
• Multi-Shot mode: Sensor shift for more accurate detail and color capture
• Weight (body + back): Around 1.63 kg
• AF system: Contrast-detection autofocus optimized for studio work
• Dynamic range: About 15 stops in photography mode
• Rear display: High-resolution touchscreen
• Connectivity: USB 3.0, Wi-Fi (optional), HDMI
• ISO range: 64–12800 (in photography)
• Build quality: Robust, ergonomic body typical of Hasselblad

Pros:

• Stunning image quality thanks to Multi-Shot
• Perfect colors and details, ideal for advertising or artistic work
• User-friendly design and interface for a medium format

Cons:

• Not primarily designed for video
• Very high price, intended only for top-tier photography studios
• Bulk and weight not suitable for “on the go” shoots

5. Canon EOS C700 FF
   Indicative price: 30,000–33,000 USD

Description:
The EOS C700 FF represents the pinnacle of Canon's cinematic line. Equipped with a Full-Frame sensor and extremely flexible recording formats, it is aimed at meeting the needs of high-budget television, film, and advertising productions.

10 Features:

• Sensor type: 35 mm Full-Frame 5.9K Canon CMOS  38.1 x 20.1 mm
• Recording resolution: Up to 5.9K RAW (with dedicated recorder)  18,69 megapixels
• Recording formats: RAW, XF-AVC, ProRes (with additional modules)
• Dynamic range: About 15+ stops
• Frame rate: Up to 60 fps in 5.9K RAW, up to 168 fps in 2K crop
• Lens mount: EF or PL (depending on version)
• Weight (body only): ~3.7 kg
• AF system: Dual Pixel CMOS AF (EF version)
• Connectivity: 12G-SDI, Ethernet, optional Wi-Fi
• Build: Modular and robust structure for heavy use

Pros:

• Great recording flexibility and workflows (RAW, XF-AVC, ProRes)
• Canon's industry-leading Dual Pixel AF (EF version)
• Excellent color management, especially with Canon cinema lenses

Cons:

• Significant cost, though lower than top-end ARRI and Sony models
• Noticeable weight: requires solid support and rigging
• Maximum potential unlocked only with additional accessories (e.g., external recorders)

Conclusion:

If you're looking for the best in image quality, robustness, and prestige, these five models (including the two medium-format cameras) dominate the ultra-high-end range. However, whether video cameras or medium-format cameras, we’re talking about prices that require budgets from film productions or luxury photography studios. And if these prices seem crazy… well, you're not the only one thinking that! But for professionals seeking absolute perfection (or those after an extreme status symbol), these tools represent the ultimate available today on the market. Happy choosing, and... watch your wallet!

Ranking: Top 5 lenses Canon, Nikon, Leica, Sony, Olympus

Imagine stepping into a garage filled with dream supercars, each brand flaunting its most powerful, cutting-edge—and, of course, prohibitively priced—model. That’s exactly where we stand when talking about these five camera lenses. Each manufacturer has rolled out its own “hypercar”—a masterpiece of optical engineering that’ll get your pulse racing… but might also make your wallet sob.

If you’ve got the guts (and the funds) to take one of these beauties for a spin, get ready to tear up the photographic track like a pro driver, capturing reality with stunning sharpness and jaw-dropping color. For the rest of us, there’s always the (still quite enjoyable) option of admiring them from afar, daydreaming, and maybe starting a supercar-shaped piggy bank. After all, dreaming is free—unlike these lenses!

An overview of five high-end lenses designed for very specific photographic needs and with significant budgets in mind. We’ll discuss technical features, strengths, and potential limitations to provide a complete perspective for those considering such an investment.

1. Canon RF 1200mm F8 L IS USM – approximately €24,000

Main Features

• Focal length: 1200mm
• Maximum aperture: f/8
• Optical Image Stabilization (IS): Yes
• Build: Canon L series, high-quality materials for robustness and durability
• Compatibility: RF mount (Canon full-frame mirrorless)
• Weight and dimensions: Very large, typical of a professional super telephoto lens

Pros

1. Exceptional reach: The 1200mm focal length allows you to capture subjects at extreme distances, ideal for wildlife (birds, wild animals) and sports in large stadiums.
2. Image quality: As expected from the L series, sharpness and color rendition are top-notch.
3. Image Stabilizer: Essential at such extreme focal lengths, it helps reduce motion blur even when using relatively slow shutter speeds for a 1200mm lens.
4. Native RF compatibility: Designed for Canon’s latest generation mirrorless cameras, it fully exploits the potential of the new camera bodies.

Cons

1. Maximum aperture of f/8: Although optical quality is excellent, such a narrow aperture limits brightness and often requires higher ISO or longer exposure times.
2. Large size and weight: Transporting and using it handheld is extremely challenging; in practice, it requires a sturdy tripod or monopod.
3. Very high cost: A major investment, suitable only for professionals with very specific needs.

2. Nikon AF-S NIKKOR 800mm f/5.6E FL ED VR – approximately €20,000

Main Features

• Focal length: 800mm
• Maximum aperture: f/5.6
• Optical Stabilization (VR): Yes
• FL (Fluorite) and ED (Extra-Low Dispersion) elements: To control aberrations and ensure high sharpness
• Compatibility: Nikon DSLRs (FX), also usable in DX mode with crop factor
• Electromagnetic diaphragm (E): For more precise exposure control

Pros

1. Excellent sharpness and color rendition: Fluorite and ED elements provide outstanding image quality.
2. f/5.6 aperture: More light intake compared to an f/8 lens, allowing lower ISO or faster shutter speeds.
3. VR stabilization: Offers several stops of advantage, especially useful at 800mm.
4. Versatility on FX and DX: Mounted on a Nikon APS-C body (e.g., the D500), it becomes the equivalent of a 1200mm lens.

Cons

1. Significant weight and bulk: Like any super telephoto lens, it’s not practical for “light” situations.
2. High cost: Though slightly more affordable than the Canon 1200mm, it’s still a specialized purchase for professional use.
3. Requires a high-end DSLR body: To fully exploit this lens’s capabilities, a professional Nikon body (such as the D6 or D850) is recommended.

3. Leica 75mm f/1.25 Noctilux-M Aspherical – approximately €14,700

Main Features

• Focal length: 75mm
• Maximum aperture: f/1.25
• Optical design: Aspherical, designed for extreme sharpness and a distinctive bokeh
• Compatibility: Leica M mount
• Primary use: Portraits, artistic reportage, low-light photography

Pros

1. Exceptionally bright aperture: f/1.25 allows shooting in very low light conditions, while producing an incredibly soft and deep bokeh.
2. Leica build quality: Sturdy, well-finished, with premium materials and minimal manufacturing tolerances.
3. Unique aesthetic rendering: The Leica “look” is renowned, especially for Noctilux lenses, offering highly recognizable image character.
4. Relatively compact (considering its brightness): Compared to super telephoto lenses, it’s easier to carry around.

Cons

1. Very high price: As is often the case with Leica, excellence comes at a cost.
2. Extremely shallow depth of field at full aperture: It can be challenging to achieve precise focus, especially on rangefinder bodies.
3. Manual focus only: Like many Leica M lenses, it lacks autofocus; focusing manually requires skill.

4. Sony FE 600mm F4 GM OSS – approximately €14,000

Main Features

• Focal length: 600mm
• Maximum aperture: f/4
• Optical SteadyShot (OSS): Yes, works in tandem with the IBIS in Sony mirrorless cameras
• G Master optical design: ED elements and other coatings to reduce aberrations and flare
• Compatibility: Sony full-frame mirrorless (E mount)

Pros

1. Wide f/4 aperture: Compared to super tele lenses with smaller apertures, it ensures better performance in low light and provides pleasing background blur.
2. Lightweight (for its class): Sony has focused on reducing weight by using magnesium and lightweight alloys, making it more “portable” than some other super telephotos.
3. Fast and accurate AF: Combined with Sony’s flagship bodies (A1, A9, A7R V), autofocus is extremely quick, ideal for sports and bird photography.
4. Combined stabilization: OSS plus the camera’s IBIS further improves shooting stability.

Cons

1. Price: While more “affordable” than some 600-800mm super tele lenses from competing brands, it’s still very expensive.
2. “Limited” to 600mm: For some extreme requirements, it may not be sufficient compared to 800mm or 1200mm lenses (though teleconverters are available).
3. Requires a high-end Sony body: To fully utilize AF capabilities and optical performance, pairing it with top-level Sony mirrorless cameras is recommended.

5. Olympus M.Zuiko Digital ED 150-400mm F4.5 TC1.25X IS PRO – approximately €7,500

Main Features

• Equivalent focal length (on Micro 4/3): 300-800mm, expandable to about 1000mm with the built-in 1.25x teleconverter
• Maximum aperture: f/4.5 constant (becomes f/5.6 with the teleconverter engaged)
• Built-in 1.25x teleconverter: Activated with a dedicated lever, making it easy to switch from 400mm to 500mm actual (equivalent to 1000mm)
• Sync IS with Olympus bodies: Among the best stabilization systems on the market
• Weight and dimensions: More compact than full-frame super tele lenses, but still considerable

Pros

1. Extreme versatility: Covers equivalent focal lengths from 300mm to 800mm, with a quick switch to approximately 1000mm; ideal for wildlife, sports, or distant subjects.
2. Excellent stabilization: In combination with Olympus cameras (OM-D series), you gain several stops of stabilization advantage.
3. Relatively compact: Compared to full-frame or medium-format alternatives, it is more manageable and lighter.
4. High image quality: Olympus’s PRO series delivers top-level optical performance, with good sharpness across the range.

Cons

1. Micro 4/3 sensor: Smaller than full frame, it may struggle in low light, especially at such long focal lengths and not-so-bright apertures.
2. High price for the Micro 4/3 system: It remains a very expensive lens, though “affordable” compared to full-frame super telephotos.
3. No support for other formats: The lens is dedicated to the Olympus/Panasonic MFT system; compatibility with other systems is impossible without adapters (and would be limited anyway).

Final Thoughts

What more can be said? Each of these lenses stands out as a top performer in its class and a dream for any photography enthusiast. Ultimately, the choice hinges on your camera system, the type of photography you do, and—above all—the budget you have.