The 50mm square, unmounted Baader 3.5/4nm f/3 Ultra-High-Speed CMOS Filter Set 50mmfrom Baader 3.5/4nm f/3 Ultra-High-Speed CMOS Filter Set 50mmfeatures three precision-grade filters recommended for extremely fast optical systems from f/3.4 to f/2.3. The set includes H-alpha, O-III, and S-II filters optimized for use with CMOS sensor cameras and suitable for CCD sensors.

3-Filter Set: H-alpha, O-III, and S-II    For f/3.4 to f/2.3 Optical Systems    CMOS-Optimized and Suitable for CCDs    Reflex-Blocker / Life-Coat    Blackened Edges

3.5/4nm half width (to harmonize exposure time of H-alpha with O-III / S-II), recommended for extremely fast optical systems from f/3.4 to f/1.8

Specially designed for filter requirements of highly opened optics, such as the Celestron RASA astrograph

Enables high contrast even with the strongest light pollution to minimize the size of stars and make nebula details accessible which is useful under a Bortle 9/8/7/(6) sky

Reflex-Blocker hard-coated and optically polished, with Life-Coat sealed coating edges

Blackened edges all around, with a filter front indicator in the form of a black outer edge on the front

Optimized for CMOS sensor cameras and suitable for CCD sensors

FWHM on each filter category is carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio

Identical filter thickness to existing standards, with attention given to parfocality in the design

Related Questions and Answers

Q: 1. does this fit the M11?

A: Yes Voigtlander Heliar 50mm f/3.5 Lens is compatible with the Leica M11.

Q: 2. What is the minimum focus distance for this lens?

A: The minimum focus distance is 1.5'.

Q: 3. What is the image circle diameter on this lens?

A: The Rokinon 50mm T1.5 DSX High-Speed Cine Lens (EF Mount) covers a 36x24mm image plane, and is intended for use with full frame sensors.

Q: 4. Can this Lens be used only for pictures, not for film

A: The Rokinon 50mm T1.5 DSX be used for film and photos.

Q: 5. Will the lens cap fit on with a filter attached?

A: Yes it will

Q: 6. I know this is probably a stupid question, but I'm fairly new to all of this. Will this work with the Beseler Cadet II?

A: Hi, you can use this lens with the Cadet II.

Q: 7. Has anyone used this with adaptor on fuji x?

A: I've only used it on a Sony A7R II with extremely nice results. I don't see why mounting it on a Fuji would be a problem. My only dislike of the lens is it's minimum focus - I wish it focused closer. Otherwise it's another beauty from Voigtlander.

Q: 8. Is is the full frame lens equivalent of this lens 100mm?

A: If you are using a camera that has a 2.0x Crop Factor, which is standard for most MFT cameras, then yes it will.

Q: 9. Will a canon ef to rf adapter work with these lens?

A: Certainly!

Q: 10. Does this fit an Olympia E-m10 mark 4?

A: Yes, the Olympus E-m10 mark 4 has a MFT lens mount that will work with the Rokinon 50mm T1.3 Compact High-Speed Cine Lens for Micro Four Thirds.