Breathe new life into your Pentax 645-mount lens by using it on a fresh Canon EF-mount camera with the Fotodiox Vizelex ND Throttle Adapter, which even features a built-in variable ND filter for added control over your exposure. The integrated ND filter of the Vizelex offers a 0.3 to 2.4 filter factor, which translates into a wide range of 1 to 8 stops. This makes the adapter ideal for videographers and photographers who may want to make quick adjustments to their filtration throughout the day. The ND filter can be used to lengthen the shutter speed or use larger apertures when working in bright sunlight. Also, the placement of the filter within the adapter means that switching lenses does not require users to fiddle with additional filters and it will even work with lenses that do not have a filter thread. Additionally, this filter is constructed of both brass and aluminum for a durable construction and precise fit with your equipment that guarantees infinity focus.

Pentax 645 Lens to Canon EF Camera    Built-In Variable ND Filter    0.3 to 2.4 Filter Factor, 1 to 8 Stops    Provides Enhanced Control over Exposure    Infinity Focus Guaranteed    Brass and Aluminum-Alloy Construction

Related Questions and Answers

Q: 1. I want to know the diameter of this lens? For example Canon 200 L lens has a diameter of 72mm. How much is for this lens?

A: The diameter of this lens is 74.5mm.

Q: 2. What is the minimum focusing distance? What is the maximum magnification?

A: The Pentax smc FA 645 300mm f/4 ED (IF) Lens has a minimum focusing distance of 7.22' / 2.2 m. This lens has a maximum magnification of 0.16x.

Q: 3. can it be used with the 645Z body?

A: Yes, this lens will work on the 645z body

Q: 4. If used on another camera via an adapter, will it still have full manual control?

A: Yes. It has an aperture ring.

Q: 5. The lens is front-focusing and I can not correct it with the 'Apply One' setting in the fine adjustment menu.How do I find out if this lens is in the 645z database or not ? If it is only adjustable with the 'Apply All' setting It would be not so convenient to remember to zero the setting every time i change lenses. Any info appreciated. Thanks.

A: Please email us at photo@a href= http://bhphoto.com target= _blank bhphoto.com/a for assistance with your inquiry.

Q: 6. If used on another camera via an adapter, will it still have full manual control?

A: It depends on the adapter. Ask the adapter Co.

Q: 7. Can you please tell me if the fine focus adjustment apply one setting works for this lens, without having to use the 'apply all' setting? it would be not so convenient to have to remember to zero the setting every time I change the lens. Thank you.

A: You will want to contact the manufacturer directly for assistance with this inquiry.

Q: 8. My 200mm 645z lens operates flawlessly but I notice that in manual focus, the focus ring is hardly damped at all. Quite, almost too easy to turn. Do any owners notice the same?

A: We have not had any issues we are aware of from customers with manual focus on that lens. If you do feel you might have an issue you need to contact direct our customer service department.

Q: 9. Does this lens offer total manual control?

A: YES

Q: 10. Can this lens be used with the Pentax 645nII (the 120 film camera)?

A: Yes, the Pentax smc FA 645 200mm f/4 IF Lens is compatible with the Pentax 645NII.