The Theia Technologies CS-Mount 1.3mm Fixed Manual Iris Lens features a fixed 1.3mm focal length that provides an ultra-wide 135° field of view with less than 3% residual barrel distortion. Using Theia's patented Linear Optical technology, this wide-angle lens corrects barrel distortion optically and does not require a custom dewarping or an image stitching algorithm which is usually associated with wide-angle lenses. This lens is designed for CS-mount cameras and supports 1/4", 1/3", and 1/2.5" image sensor sizes.

Can be Used with up to 5MP Cameras    Ultra-Wide 135° Field of View    Features Linear Optical Technology    < 3% Residual Barrel Distortion    Designed for CS-Mount Cameras    Supports 1/4", 1/3", 1/2.5" Image Sensor

Patented Linear Optical Technology

Wide field of view

Low barrel distortion

Related Questions and Answers

Q: 1. Can i use this on an OMD em5 please?

A: This lens will work on any micro 4/3s camera but remember it is a manual lens. You will have to focus manually.

Q: 2. what size (in mm) of filter should fit on?

A: As stated in the spec section: 67mm

Q: 3. Is there any difference between the black and the silver version for the Fuji X mount? Besides the price?

A: There is no difference at all in terms of the functionality. The silver lens goes quite well with my silver Fuji X-E2. Keep in mind that the lens hood for the silver lens is black.

Q: 4. Medium photography experience. Zero architecture shooting experience. Would this be a good lens for me. Up to this point I've been steered to the FUJI 10-24 which is a bit pricey for me. Suggestions? Thank you.

A: I have the 10-24 Fuji xt lens which i used the most in Iceland. It is a fabulous lens. I bought this particular lens for Astro photography aka northern lights. It is a great lens for the money.

Q: 5. Is this an autofocus lenses???

A: It's manual focus only. With this short focal length and high depth of field, you typically put it at infinity (which you have to check by live view zoomed in and not trust the markings on the lens) and don't change the focus during the entire day. Unless you're planning on taking close-ups of course.

Q: 6. Is this lens compatible with the Sony Alpha a7II (full-frame CMOS sensor)?

A: Yes and no. The mount will fit but image probably will not cover the entire sensor. I believe there is a function on the camera that will automatically crop the picture bu

Q: 7. How is the warranty for this lens?

A: You receive a limited 1 year warranty that comes directly from Samyang. If you have any issues with the lens, you can reach out to them for a resolution.

Q: 8. Just purchased the Rokinon 16mm F/2.0 with Pentax K mount for my Pentax K-5 IIs body. With the aperture ring set to A, and setting to AV (also B, TAV modes), cannot get F stop to F2 (only goes to F4). Any suggestions? Already have an F4 lens, so getting to F2 is important. Thanks!

A: I believe the lens is defective. I would recommend contacting customer service to get a replacement.

Q: 9. Is this auto focus?

A: No, but but focus peaking and focus magnification make manual focus easy, and focus isn't very critical with a 12mm lrns anyway.

Q: 10. Can you take the Hood off of this lens Samyang 10mm/f2.8 ?

A: The hood is manufactured into the lens. They are not separate.