Telephoto Lens for Nikon - F Lens 420-800mm for Nikon DSLR, Manual Focus MF Zoom Lens for Nikon D3500 D850 D7500 D5600 D3400 D500 D7200 D5500 D750 D810 D3300 D5300 D610 D7100 D5200 etc
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AI Verdict
This 420-800mm manual focus F-mount telephoto lens, weighing 1.58 pounds, is for budget-conscious hobbyists wanting extreme reach for static subjects like the moon or distant wildlife.
This lens is a situational fit because its 420-800mm manual focus range and fixed F/8.3-16 aperture cater specifically to niche uses like moon or distant, static wildlife photography on a tight budget. Its manual operation and lack of image stabilization demand patience and specific shooting conditions, making it unsuitable for general telephoto needs.
If you need faster focusing, better low-light performance, or image stabilization, look for lenses with autofocus, wider variable apertures (e.g., f/2.8-5.6), and built-in Vibration Reduction (VR).
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Pros
- Offers a super telephoto 420-800mm focal length, extending reach for distant subjects.
- Features an F mount, allowing direct attachment to Nikon DSLR cameras without an additional T-adapter ring.
- Constructed with robust, high-quality materials, suggesting durability.
- Weighs 1.58 pounds, which is relatively light for its focal range.
- Priced in the entry band ($50-$99), making extreme telephoto accessible.
Cons
- Requires manual focus, which is difficult for moving subjects and video.
- Has a fixed aperture of F/8.3-16, limiting low-light performance and depth of field control.
- Lacks electronic contacts, meaning the camera cannot read aperture values and requires manual exposure settings.
- No image stabilization, making sharp images at long focal lengths challenging without a tripod.
- The camera must be set to M (Manual) mode to avoid 'Lens not attached' errors.
Dimension Scores
The fixed F/8.3-16 aperture and manual focus, combined with the entry-level price, suggest image quality will be below average compared to higher-end telephoto lenses, especially at 800mm.
This lens has no autofocus motor and is manual focus only, making autofocus speed irrelevant.
Manual focus and a fixed, narrow aperture (F/8.3-16) make smooth, well-exposed video capture very difficult, especially for moving subjects.
Weighing 1.58 pounds, it's reasonably portable for a super telephoto lens, though its physical length can still be cumbersome.
Best For
- Hobbyist photographers on a strict budget.
- Capturing stationary distant subjects like the moon or landscapes.
- Learning and practicing manual focus techniques.
- Daytime wildlife photography where subjects are not rapidly moving.
Not Recommended For
- Fast-action sports or wildlife photography requiring quick autofocus.
- Low-light photography due to the fixed, narrow aperture.
- Videography, as manual focus is challenging for smooth footage.
- Photographers expecting professional-grade image quality or convenience.
Watch Out For
- Focusing is entirely manual, making it 'very difficult' to achieve sharp images, especially for video.
- The camera will display 'F--' because the lens lacks electronic contacts, requiring manual ISO/Shutter speed adjustments to prevent over/underexposure.
- Absence of image stabilization means a sturdy tripod is essential to avoid blur, particularly at 800mm.
- The fixed aperture of F/8.3-16 means you'll need ample light, and depth of field control is limited.
- Expect a learning curve; this is described as 'the most difficult superzoom lens to use' due to its manual nature.
Full Specifications
| ASIN | B0DP6YRB46 |
| Brand | BENOISON |
| Lens Type | Telephoto |
| Item Weight | 1.58 pounds |
| Manufacturer | BENOISON |
| Item model number | 420-Nikon--F |
| Product Dimensions | 9.45 x 2.64 x 2.64 inches |
| Compatible Mountings | Nikon F |
| Camera Lens Description | Manual focus 420-800mm telephoto lens (F mount) |
| Focal Length Description | 420-800mm |
What Buyers Say
This 420-800mm telephoto lens is a 'cheapest & most difficult superzoom lens to use' due to its complete lack of autofocus and image stabilization. Users will find the 'all metal build quality is really great' but that 'focusing on something will be very difficult even making the videos'. It demands significant patience and practice, especially for anything other than static subjects, and requires a tripod for sharp results.
“Look, I got this thing cause it was cheap and I wanted to shoot the moon, and yeah, it does that, but man, trying to focus on anything else is a nightmare, my arms hurt from holding it steady and half my shots are blurry.”
Common Praise
- Provides extreme telephoto reach (420-800mm) for a very low price.
- F-mount compatibility means no extra adapter needed for Nikon DSLRs.
- The 'all metal build quality is really great', suggesting durability.
- Good for experimenting with super telephoto photography without a large investment.
Common Complaints
- Manual focus is 'very difficult' and time-consuming, especially for moving targets or video.
- Lack of image stabilization makes sharp handheld shots nearly impossible at long focal lengths.
- Fixed, narrow aperture (F/8.3-16) severely limits low-light performance.
- Requires camera to be in M mode and manual setting of exposure, which can be frustrating.
- Image quality can be soft, particularly at the 800mm end and if not perfectly focused.
Ownership Tips
- You'll spend a lot of time fiddling with the focus ring to get anything sharp.
- A heavy-duty tripod isn't optional; it's a requirement for usable photos.
- Shooting in bright daylight is essential; forget about anything indoors or at dusk.
- Learning to manually set ISO and shutter speed in M mode becomes second nature, or your photos are just black or white.
- The lens extends quite a bit when zoomed, making it unwieldy without proper support.
Frequently Asked Questions
Does this lens have autofocus?
No, this is a manual focus (MF) lens only. You will need to turn the focus ring on the lens yourself to achieve focus.
Why does my camera show 'Lens not attached' or 'F--'?
This lens lacks electronic contacts, so your camera can't communicate with it. You must set your camera to M (Manual) mode, and the 'F--' indicates the camera isn't reading an aperture value from the lens.
Can I use this lens for shooting sports or fast-moving animals?
It's not recommended for fast-moving subjects. The manual focus makes it extremely challenging to track and get sharp images of anything in motion.
Do I need a tripod with this lens?
Yes, a sturdy tripod is highly recommended, especially at longer focal lengths like 800mm, because the lens has no image stabilization and even slight camera shake will cause blur.
What kind of image quality can I expect?
Given its price point and manual nature, expect image quality that is adequate for hobbyist use, particularly when well-focused and shot in good light. It may not match the sharpness of more expensive, optically complex lenses.
Buying Guide
When looking at super telephoto lenses like this, you need to understand that extreme focal lengths come with trade-offs, especially at this price point. You're trading convenience for reach. Manual focus means you're doing all the work, and a fixed, narrow aperture dictates when and where you can shoot. Don't expect to just point and shoot; this lens demands patience and technical understanding.
Focal Length (420-800mm)
This number tells you how 'zoomed in' the lens is. 420-800mm is like having super binoculars for your camera, letting you capture tiny details of distant objects, but it also means you can't fit much into the frame.
Aperture (F/8.3-16)
The aperture is like the pupil of your eye; it controls how much light gets in. F/8.3-16 is a 'small' aperture, meaning it lets in less light. This makes it challenging to shoot in dim conditions and limits how much you can blur the background.
Manual Focus (MF)
Unlike lenses that automatically focus, with MF, you physically turn a ring on the lens to get your subject sharp. This is great for precise control on static subjects but incredibly difficult for anything moving, like birds in flight.
Alternatives
If this lens doesn't fit, look for telephoto lenses with a wider, variable aperture (e.g., f/4-5.6), built-in image stabilization, and especially autofocus for easier use with moving subjects.
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