Opteka 6.5mm f/3.5 Fish-Eye CS
Optical design
Full frame equivalent focal length is 9.0 mm. Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Average brightness in this leaguePhysical characteristics
Weights 414 grams so plan ahead, carry only if really necessary. 75 mm long, requires consideration if you want to carry in the camera bag.Opteka 6.5mm f/3.5 Fish-Eye CS purchase historyStable
Prices have held steady across 56 months of tracked sales — pay around the $66.00 fair value and watch for outliers below it.
Best deals
72 of 139 tracked sales (52%) closed at or under the $66.00 fair value.
- Dec 15, 2025$20.00$-46.00 / typical
- Jul 11, 2024$22.00$-44.00 / typical
- Jul 11, 2024$23.00$-43.00 / typical
- Nov 16, 2024$27.00$-39.00 / typical
- Nov 16, 2024$28.00$-38.00 / typical
eBay Auctions
No active auctions found.
Technical Specifications
Similar Lenses
Reviews
Budget Fish-Eye lens worth every penny This lens gets a 5 Star rating from me because the picture quality is better than you would think it would be for the price of the lens. I own numerous lens and out of a scale of 1 to 10, I would give the picture quality a solid 7. I actually like the manual aperture control and the focus is easy enough to figure out. If you turn this lens vertical it can Actually See Behind You. Can you imagine the amazing sunset pictures you could get with that?
Retro Lens On a full frame camera the lens is only a circular fisheye like the ones from the 1970s. Its even manual focus. Unfortunately unlike the modern full frame fisheye lenses its not very useful today.
"Great Fisheye lens for an affordable price" What I liked about the Opteka lens was the fact I could remove the pedal on the lens. This is not a major issue if you own a DX format camera. However ever on an FX body the image is a bit cropped, and when removing the pedal tulip you get a full circular image. On FX cameras you will still have some black around the outside of the circular image but for me I am a visual artist and the circular fish eye affect was amazing.
Frequently Asked Questions
What is the Opteka 6.5mm f/3.5 Fish-Eye CS?
Opteka 6.5mm f/3.5 Fish-Eye CS is a camera lens with 6mm focal length, a maximum aperture of f/3.5/22, for the Canon EF, Canon EF-S, Minolta A, Nikon DX, Nikon FX, Pentax K, Sony A mount, supporting the Aps-c format, weighing 414g.
What mount is the Opteka 6.5mm f/3.5 Fish-Eye CS compatible with?
Opteka 6.5mm f/3.5 Fish-Eye CS uses a Canon EF, Canon EF-S, Minolta A, Nikon DX, Nikon FX, Pentax K, Sony A mount and supports the Aps-c format.
How much does the Opteka 6.5mm f/3.5 Fish-Eye CS cost?
Based on recent eBay sold listings the Opteka 6.5mm f/3.5 Fish-Eye CS typically sells for around $20.00. Actual prices vary with condition and seller.
Is the Opteka 6.5mm f/3.5 Fish-Eye CS a good lens?
Opteka 6.5mm f/3.5 Fish-Eye CS has a community rating of 4.3/5 from 46 review(s).
Which lenses are similar to the Opteka 6.5mm f/3.5 Fish-Eye CS?
Similar lenses include 7artisans 7.5mm f/2.8, Kelda 6.5mm f/3.5 Fisheye CS, Lensbaby 5.8mm f/3.5 Circular Fisheye.