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The BENOISON 420-800mm telephoto lens for Canon EF/EF-S mount DSLR cameras offers a powerful manual focus zoom range ideal for wildlife and moon photography. Featuring a fixed aperture range of f/8.3 to f/16, this durable lens requires manual operation but delivers sharp, detailed images. Compatible with a broad spectrum of Canon DSLR models, it’s a budget-friendly choice for enthusiasts seeking extended reach and precision control.
















| ASIN | B0DCW3DMT2 |
| Best Sellers Rank | #34 in SLR Camera Lenses |
| Brand | BENOISON |
| Built-In Media | Lens Cleaning Cloth, Telephoto Lens, User Manual |
| Camera Lens | Manual focus 420-800mm telephoto lens |
| Camera Lens Description | Manual focus 420-800mm telephoto lens |
| Color | Black |
| Compatible Camera Models | for Canon 10D-90D Series, for Canon 1D/5D/6D/7D Series, for Canon 40000D 3000D 1500D Series, for Canon Rebel Series |
| Compatible Camera Mount | Canon EF, Canon EF-S |
| Compatible Devices | for Canon EF/EF-S mount DSLR cameras |
| Compatible Mountings | Canon EF, Canon EF-S |
| Customer Reviews | 4.3 out of 5 stars 286 Reviews |
| Exposure Control Type | Manual |
| Focal Length Description | 420-800mm |
| Focus Type | Manual Focus |
| Image stabilization | No image stabilization |
| Lens | Telephoto |
| Lens Design | Zoom |
| Lens Fixed Focal Length | 420 Millimeters |
| Lens Mount | Canon EF, Canon EF-S |
| Lens Type | Telephoto |
| Manufacturer | BENOISON |
| Manufacturer Part Number | 420C-B-EF |
| Maximum Aperture | 8.3 f |
| Maximum Focal Length | 800 Millimeters |
| Media Type | ProductImage |
| Minimum Aperture | 16 f |
| Minimum Focal Length | 420 Millimeters |
| Photo Filter Size | 62 Millimeters |
| Real Angle Of View | 5 Degrees |
| Warranty Description | 1 year |
| Water Resistance Level | Not Water Resistant |
| Zoom Ratio | 1: 1.9 |
P**R
Quality Lens
Great lens for the price. Only downside is that it is fully manual and not able to do autofocus. This makes it hard to capture birds in flight and get detailed photos. But for still instances, it works well with expertise and practice. Here are some of the pictures I have taken with it. I have had this lens for a year now, now upgrading to a Sigma 150-600 mm lens for the Autofocus capabilities. I really appreciated this lens for the convenient price.
K**E
Quality Lens at a great price
Very happy with my purchase. I bought this to take on a cruise to Alaska. I found that it works best on "Sports" mode and it's not for taking quick shots. The manual focus lens is better suited for taking still shots with some type of stability. Easy to attach and detach. Construction seems to be quality. Not overly heavy, but not lite either. I'm looking forward to my next trip so I can use it again.
M**R
Excellent value for a budget lens
I only drag out a lens of this focal length occasionally, so I can't justify $500+ for a good name brand lens. This lens is perfect for my occasional nature or astrophotography. I have to strongly recommend the seller. I tried to use the first lens I received well after the Amazon return window ended for it. There was a big problem with the EF mount for the Canon. It would not turn and lock in. The lugs of the lens would insert into the camera body but something was machined in the lens' mount that blocked it from turning. I posted a review describing the issue. Less than a week later the seller contacted me and eventually offered a replacement lens. The new lens works fine. Attached is a photo of the blood moon of 3/14/25. There is no automatic focus or exposure and the lens is fixed aperture. I find that aperture priority auto, or full manual mode, works best.
D**A
Great quality for the price
I was a little skeptical about purchasing this lens but I must say I love it I use it with a canon EOS 4000D the quality is great image quality is great keep in mind there’s no autofocus this is a manual lens it’s a bit heavy if you have a steady hand great if not I suggest using a tripod other than that it’s very easy to use
L**S
Works perfectly
Very impressed for the price, tested it out and it worked perfect with my canon R with my adapter EF lens ring
M**E
KNOW WHAT YOU'RE BUYING!!!
A few things you should know before purchasing this lens. It is FULL MANUAL, it says that upfront in the instructions. That being said, there are NO PINS, nothing to connect the lens' functions to the camera, so adapters won't work. Make sure you get the proper version for your camera. For example, I got the Canon ef/ef-s mount. It works fine with my T5i, 7DII, and 5DIV. However, my M50 and R6 with ef/ef-s adapters do not allow the cameras to shoot because without adapter pins to properly allow the lens to communicate to the body, the camera thinks the lens is loose, and will not fire. UPDATE: If the camera setting "release shutter without lens" is on, this may allow the adapters to work, however, your aperture setting will still read f00. The fit is tight and secure however, so you just have to make sure you get the proper version of this lens for the body to which you want to attach it. That said, it is what it is. Its a $50 novelty lens that indeed gets you 400-800mm. Its basically a kid telescope that you can attach to a dslr. Good focus IS possible for sharp photos with patience and good settings. To a point. LOTS of light is needed. Remember, this is full manual so aperture shrinks as you move from 400 to 800. Wanna shoot astro? Just be ready to accept grainy photos because your ISO is going to have to be STELLAR (see what I did there?) There is no way around it, its just a slow lens. The adjustment rings are solid, tight and smooth, almost a bit too tight. I would not recommend using the foot to mount to a tripod if you have anything larger than an M50--the foot ring allows for rotational adjustment but just that. You cannot slide the ring to adjust for balance (Unless i missed something--seems to be slotted). But again--remember, youre not paying 2K+ for this. Its a novelty lens, good for telephoto kicks, or to see if yo need 800mm (assuming you can get your mind past the shortcomings). Its solid, doesnt feel like a cheap piece of plastic, like its going to fall apart. The optics aren't amazing, but again--50 bucks for an 800mm...
B**T
Great lens
Great value
E**S
Bamboozled
I can’t get the damn lens off. Any suggestions would be helpful. if I could this would get zero stars.
Trustpilot
1 week ago
1 week ago