This Kowa LM25HC 25mm Fixed C-Mount Lensfrom Kowa LM25HC 25mm Fixed C-Mount Lensis designed for 1" format megapixel cameras with a C-mount. It features low distortion and has a focusing range of just under 1' to infinity. The wide aperture range of 1.4 to f/16 allows you to use the lens in a wide range of lighting conditions.

The high resolving power of the lens, 100 line pairs per millimeter in the center, allows you to use the lens with smaller format sensors. It features an M35.5 front filter thread for adding filters to the lens.

Covers 1" Format Sensors    Focuses from 1' to Infinity    F-Stop Range: f/1.4 to f.16    100 LPM Resolution Center    M35.5 Front Filter Thread

Related Questions and Answers

Q: 1. How does the lens focus? and How is the diaphragm controlled?

A: You adjust the focus and aperture manually. There are no auto functions available.

Q: 2. Is this lens manual aperture?

A: Yes the aperture would be manually adjusted: Aperture f/1 to 2 Angle of View 1/3" Sensor Horizontal: 118.6° Vertical: 90° 1/4" Sensor Horizontal: 90° Vertical: 67.9° Minimum Focus Distance 0.666666666666667' / 0.2 m Focus Type Manual Focus Iris Type Manual

Q: 3. It is compatible with nikon D5600?

A: No it is not compatible with your Nikon camera. This lens offers a C mount often found on industrial and surveillance box type cameras.

Q: 4. Should my focus ring be more accurate? When my focus ring is set to 7' focus is actually at 5'. When I set to 4' focus is 2' 8 . I do tend to measure my manual focus lenses and this is my first I feel I can't trust. I do feel infinity focus seems a bit soft, is it possible I'm not able to get infinity focus if the actual focus distance is shorter then marked? Wondering if I should return... anyone else test the focus ring accuracy?

A: In my decades of being a motion picture camera assistant, this was a situation the we had to look our for. The problem is either the lens is out of collimation or the lens mount flange depth is off. If both are correct, Infinity is Infinity and 5' is 5'. I would suggest that it is the lens and that you should exchange it if you bought it from B&H less than 30 days ago.Contact B&H Customer service to do so. B&H Customer Service Contact: https://bhpho.to/2caRE5L. If the lens comes back and you still have an issue or you purchased longer than 30 days ago, take or send the lens and the camera to a camera service center.

Q: 5. will this fit a canon xa20?

A: Sorry, but the Canon XA20's lens is not removable so there is no way to mount this Kowa lens. Since 25mm is very telephoto on the XA20's 1/2.84 HD CMOS Sensor, you might consider this tele converter that you mount on the front of the XA20's permanent lens. Canon TL-H58 Tele-Converter Lens (1.5x) B&H # CATLH58. Of course, this all depends on what you are planning to do.

Q: 6. Is the mount on this lens compatible with the Olympus OMD EM1 Mark II camera?

A: Yes it is. The Olympus OM-D E-M1 Mark II has an MFT mount.

Q: 7. How to calculate the angle of view parameters?

A: With a 1" Sensor this lens has the following angle of views: Vertical: 79.4° Horizontal: 96.8° Diagonal: 108.4°

Q: 8. Does anybody have recommendations on a front filter adapter so I can add an ND filter? Something small? Thanks!

A: Sorry, but wide angle lenses need large filters in order that the filter holders are not photographed. B&H does not seem to have a suitable filter holder at this time. However, here is a clamp that may work. http://bit.ly/19azXhK

Q: 9. Will this work on a c-mount Bolex H16?

A: yes it will work on a c-mount Bolex

Q: 10. Will you be selling its newer wider young brother the Kowa LM4HC?

A: We currently do not have additional information regarding this product. We are selling the "6" version, but have no confirmed data as to whether we may expand that catalogue with Kowa.