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Silvertooth · 12-25-2017, 06:24 PM

Please forgive if this has been asked and answered, but I could not find it after searching. Will the newer 645 DA lenses work on a 645N or 645Nii? From what I have read, I think they will, but thought I would ask the experts. I played with an old Adox medium format camera this past week and have been bitten with the medium format bug. I primarily want a film camera (for now), but desire the forward and backward compatibility I believe the Pentax gear offers.. Thank you fine folk for your time!
Aubrey

Adam · 12-25-2017, 06:31 PM

Originally posted by Silvertooth

Please forgive if this has been asked and answered, but I could not find it after searching. Will the newer 645 DA lenses work on a 645N or 645Nii? From what I have read, I think they will, but thought I would ask the experts. I played with an old Adox medium format camera this past week and have been bitten with the medium format bug. I primarily want a film camera (for now), but desire the forward and backward compatibility I believe the Pentax gear offers.. Thank you fine folk for your time!
Aubrey

Yes they will, though DA lenses without an aperture right don't allow for manual aperture control on film bodies (so you'd be shooting in P or Tv), and any SDM-only lenses will require manual focus. Also, I'm not sure about how well the 28-45mm covers the full film image circle, though the other lenses should be fine.

The D FA 35mm will be fully compatible since it uses screwdrive and is essentially a modern refresh of the old film FA 35mm.

Silvertooth · 12-25-2017, 06:41 PM

Originally posted by Adam

Yes they will, though DA lenses without an aperture right don't allow for manual aperture control on film bodies (so you'd be shooting in P or Tv), and any SDM-only lenses will require manual focus. Also, I'm not sure about how well the 28-45mm covers the full film image circle, though the other lenses should be fine.

The D FA 35mm will be fully compatible since it uses screwdrive and is essentially a modern refresh of the old film FA 35mm.

Thank you, Adam! I appreciate your time.
Aubrey

**Alex645** · 12-25-2017, 09:07 PM

Aubrey,
I concur with Adam. Even my 645 with the 645 SMC-A 35mm noticeably vignettes, so I'd expect the same or more on any wide angle 645 DA wide open.

Keep in mind that to get the equivalent field of view, the 645 is .62x full frame (FF) focal lengths. (35mm 645=21mm FF; 75mm 645=45mm FF; etc).

And if you're eventually thinking of a 645D or 645Z in your future, the 645N creates a 56 x 41.5mm image on film vs. the 645D/Z with a 44x33mm sensor.
Thus .63x 645N=645D/Z with digital.
or
.79x 645D/Z=FF.

Silvertooth · 12-28-2017, 03:34 PM - **1 Like**

Originally posted by Alex645

Aubrey,
I concur with Adam. Even my 645 with the 645 SMC-A 35mm noticeably vignettes, so I'd expect the same or more on any wide angle 645 DA wide open.

Keep in mind that to get the equivalent field of view, the 645 is .62x full frame (FF) focal lengths. (35mm 645=21mm FF; 75mm 645=45mm FF; etc).

And if you're eventually thinking of a 645D or 645Z in your future, the 645N creates a 56 x 41.5mm image on film vs. the 645D/Z with a 44x33mm sensor.
Thus .63x 645N=645D/Z with digital.
or
.79x 645D/Z=FF.

Thank you for the very useful information! Pentaxians and Minolta folk are always the most helpful, least judgmental folk around!
Aubrey

12-25-2017, 06:24 PM	#1
Silvertooth Junior Member Join Date: Aug 2010 Location: Texas Posts: 26	Lens Compatability Please forgive if this has been asked and answered, but I could not find it after searching. Will the newer 645 DA lenses work on a 645N or 645Nii? From what I have read, I think they will, but thought I would ask the experts. I played with an old Adox medium format camera this past week and have been bitten with the medium format bug. I primarily want a film camera (for now), but desire the forward and backward compatibility I believe the Pentax gear offers.. Thank you fine folk for your time! Aubrey

12-25-2017, 06:31 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by Silvertooth Please forgive if this has been asked and answered, but I could not find it after searching. Will the newer 645 DA lenses work on a 645N or 645Nii? From what I have read, I think they will, but thought I would ask the experts. I played with an old Adox medium format camera this past week and have been bitten with the medium format bug. I primarily want a film camera (for now), but desire the forward and backward compatibility I believe the Pentax gear offers.. Thank you fine folk for your time! Aubrey Yes they will, though DA lenses without an aperture right don't allow for manual aperture control on film bodies (so you'd be shooting in P or Tv), and any SDM-only lenses will require manual focus. Also, I'm not sure about how well the 28-45mm covers the full film image circle, though the other lenses should be fine. The D FA 35mm will be fully compatible since it uses screwdrive and is essentially a modern refresh of the old film FA 35mm. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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12-25-2017, 06:41 PM	#3
Silvertooth Junior Member Join Date: Aug 2010 Location: Texas Posts: 26 Original Poster	Originally posted by Adam Yes they will, though DA lenses without an aperture right don't allow for manual aperture control on film bodies (so you'd be shooting in P or Tv), and any SDM-only lenses will require manual focus. Also, I'm not sure about how well the 28-45mm covers the full film image circle, though the other lenses should be fine. The D FA 35mm will be fully compatible since it uses screwdrive and is essentially a modern refresh of the old film FA 35mm. Thank you, Adam! I appreciate your time. Aubrey

12-25-2017, 09:07 PM	#4
Alex645 Site Supporter Join Date: May 2015 Location: Kaneohe, HI Photos: Albums Posts: 3,527	Aubrey, I concur with Adam. Even my 645 with the 645 SMC-A 35mm noticeably vignettes, so I'd expect the same or more on any wide angle 645 DA wide open. Keep in mind that to get the equivalent field of view, the 645 is .62x full frame (FF) focal lengths. (35mm 645=21mm FF; 75mm 645=45mm FF; etc). And if you're eventually thinking of a 645D or 645Z in your future, the 645N creates a 56 x 41.5mm image on film vs. the 645D/Z with a 44x33mm sensor. Thus .63x 645N=645D/Z with digital. or .79x 645D/Z=FF.

12-28-2017, 03:34 PM - 1 Like	#5
Silvertooth Junior Member Join Date: Aug 2010 Location: Texas Posts: 26 Original Poster	Originally posted by Alex645 Aubrey, I concur with Adam. Even my 645 with the 645 SMC-A 35mm noticeably vignettes, so I'd expect the same or more on any wide angle 645 DA wide open. Keep in mind that to get the equivalent field of view, the 645 is .62x full frame (FF) focal lengths. (35mm 645=21mm FF; 75mm 645=45mm FF; etc). And if you're eventually thinking of a 645D or 645Z in your future, the 645N creates a 56 x 41.5mm image on film vs. the 645D/Z with a 44x33mm sensor. Thus .63x 645N=645D/Z with digital. or .79x 645D/Z=FF. Thank you for the very useful information! Pentaxians and Minolta folk are always the most helpful, least judgmental folk around! Aubrey

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