This 65mm square, unmounted Baader 3.5/4nm f/3 Ultra-Highspeed S-II CMOS Filter from Alpine Astronomical is recommended for extremely fast optical systems from f/3.4 to 2.3 and is particularly designed for the special filter requirements of f/3 optics. The filter features a Reflex-Blocker hard coating, which has been optically polished, and has Life-Coat sealed edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

Optimized for CMOS, Suitable for CCD    Reflex-Blocker Hard Coated    Life-Coat Sealed Coating Edges

Related Questions and Answers

Q: 1. Does it work with Sony full frame such as A7iii under super 35mm mode? Thanks.

A: Yes, it will. :) Super35 mode on the A7-series cameras will set the sensor to an APS-C format.

Q: 2. Can the Fujifilm X-M1 be used?

A: FUJIFILM X-M1 Mirrorless Digital Camera can be used with the Venus Optics Laowa 65mm f/2.8 2x Ultra Macro APO Lens for FUJIFILM X BH #VE6528FX. The lens has a manual focus design.

Q: 3. How long is the lens at maximum extension?

A: Being that the Laowa 65mm f/2.8 2X Ultra Macro APO Lens has internal focusing, the length of the barrel would not change.

Q: 4. I se in the Q/A that there are no electrical contacts. That would suggest no metering as well - correct?

A: That is correct.

Q: 5. Does this lens come with a lens hood?

A: A lens hood is not included with the Venus Optics Laowa 65mm f/2.8 2x Ultra Macro APO Lens for Sony E.

Q: 6. What magnification ratio is the lens optimized for? I could not find that information on the Laowa site.

A: The Venus Optics Laowa 65mm f/2.8 2x Ultra Macro APO Lens can focus as close as 6.7 inches with a 2:1 macro ratio and all the way up to infinity. The optimal focus will depend on the subject.

Q: 7. How well does this lens work with a Sony A6400?

A: The Venus Optics Laowa 65mm f/2.8 2x Ultra Macro APO Lens for Sony E is a sharp lens that is compatible with the Sony a6500. The lens will have teh same angle of view as a 97.5mm on a full frame camera. The minimum focus distance is 6.69". At this distance you will get a 2:1 2X life size image.

Q: 8. If you use this lens with a full frame camera, like the Sony a7iv, do you still get the same 2x magnification?

A: Yes the Venus Optics Laowa 65mm f/2.8 2x Ultra Macro APO Lens for Sony E is compatible with a full frame camera such as the Sony A7IV. The 2x magnification is a macro focusing specification and does not refer a crop factor.

Q: 9. Will the Laowa 65mm macro lens store its EXIF information in the Fujifilm camera?

A: There are no electronic contacts so there will not be any exif info.

Q: 10. Is it good for taking photos of engagement ring with 2mm stones?

A: Being that its minimum focusing distance is 6.7 inches, the Venus Optics Laowa 65mm f/2.8 2x Ultra Macro APO Lens for FUJIFILM X would be an excellent choice to shoot an engagement ring with 2mm stones.