The Pentax FA 645 200mm f/4 IF Lensfrom Pentax FA 645 200mm f/4 IF Lensis a medium-format, manual and autofocusing telephoto lens with a 35mm-equivalent focal length of 157mm. It provides a soft out-of-focus (bokeh) effect. It features two extra-low dispersion (ED) glass elements to correct for chromatic aberration, and a ghostless coating to effectively eliminate reflections on the inner surface of the lens, in order to provide sharp images with high contrast. The inner focusing system improves focusing speed and minimizes lens extension, allowing for a closer minimum focus distance.

Pentax 645 Mount    35mm Equivalent Focal Length: 157mm    Aperture Range: f/4-32    Internal Focusing    2 Extra-Low Dispersion Glass Elements    Ghostless Coating Eliminates Reflections

Medium-format, manual and autofocusing telephoto lens with a 35mm-equivalent focal length of 157mm

Maximum aperture of f/4 can be stopped down to f/32 via the aperture ring in manual mode. Alternatively, full automatic diaphragm control is available

Provides a soft out-of-focus (bokeh) effect

Features two extra-low dispersion (ED) glass elements to correct for chromatic aberration, and a ghostless coating to effectively eliminate reflections on the inner surface of the lens, in order to provide sharp images with high contrast

Internal focusing system improves focusing speed and minimizes lens extension, allowing for a closer minimum focus distance

Supplied lens hood blocks stray light in order to prevent lens flare. Also offers some additional protection against impact for the front element, should you get a bit too close to your subject

Related Questions and Answers

Q: 1. Does this lens offer total manual control?

A: Yes this lens offers manual control.

Q: 2. 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: 3. What is the right replacement lens shade for this?

A: I contacted Pentax with your inquiry, and they stated the correct lens hood for the Pentax smc FA 645 80-160mm f/4.5 Lens is the Pentax PH-RBF77 Lens Hood, MFR Part # 38729. Unfortunately this lens hood is no longer manufactured by Pentax and currently we do not have the lens hood in new or used options. I did check our new department and our Used Photography Department, but unfortunately, we do not have the lens hood new or used. As such, you may have to check either online in used camera stores or on a auction site like eBay to see if anyone is selling the lens. I do apologize for any inconvenience this may cause you.

Q: 4. 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: 5. Can the tripod mount ring be removed?

A: No, the tripod mount ring on the Pentax smc FA 645 300mm f/4 ED (IF) Lens cannot be removed.

Q: 6. Is this lens compatible with the Pentax 645n medium format film camera?

A: The Pentax smc FA 645 33-55mm f/4.5 AL Lens is compatible with the Pentax 645N camera.

Q: 7. 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: 8. Hello,I would like to know how this lens performs. Being that there is no review yet, the only thing left to do is ask for your help. I will use this for the Pentax 645z that will be bought this week at your store alongside the 55mm. Is the IQ any good? It is not cheap, but half the price of the new 28-45. Is there any huge gap between the two?Thank you :)

A: The Pentax 33-55 will give you excellent image quality, with 11 elements and 8 groups, using low dispersion glass. It will give you smooth out of focus areas, with an 8 blade aperture diaphragm.

Q: 9. I am confused. If a full frame sensor is smaller than 645, shouldn't the effective focal length increase instead of decrease?

A: Typically, angle-of-view and focal length are described relative to full-frame 35mm as it is more widespread in use. Crop factors would be then be 1x for 35mm, 1.5x for APS-C, and 0.6~0.8 (rough estimate) for medium format sensors. Since this lens is still technically (from physical distance measured stand-point) 400mm from the sensor, it's a 400mm lens. However, its angle-of-view would be equivalent to a 315mm on a full-frame.

Q: 10. can it be used with the 645Z body?

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