Shutter Speed on 645N

JayH · 11-09-2011, 05:40 PM

In aperture priority mode I took a shot at 1/750th. There is no click on the shutter dial to get this speed? Is there any way to manually achieve the 1/750th? What other speeds can you get using aperture priority aside from 750? I have only run a couple of rolls of film through my camera and just noticed this on the imprinted data.

Thanks

Adam · 11-09-2011, 08:01 PM

The shutter is stepless, so in Av mode it will select 1/750s if it's trying to expose between 1/500 and 1/1000 (although it will likely round up or down in the VF).

I'm afraid there's no way of keying in that shutter speed manually, though.

Swift1 · 11-09-2011, 08:05 PM

Originally posted by JayH

In aperture priority mode I took a shot at 1/750th. There is no click on the shutter dial to get this speed? Is there any way to manually achieve the 1/750th? What other speeds can you get using aperture priority aside from 750? I have only run a couple of rolls of film through my camera and just noticed this on the imprinted data.

Thanks

I could be wrong but, I think the 645N will use half stop shutter speeds in P or Av mode. 645NII will do third stops I think.
I'm pretty sure you can only use full stops in M mode.

11-09-2011, 05:40 PM	#1
JayH New Member Join Date: Sep 2011 Posts: 10	Shutter Speed on 645N In aperture priority mode I took a shot at 1/750th. There is no click on the shutter dial to get this speed? Is there any way to manually achieve the 1/750th? What other speeds can you get using aperture priority aside from 750? I have only run a couple of rolls of film through my camera and just noticed this on the imprinted data. Thanks

11-09-2011, 08:01 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	The shutter is stepless, so in Av mode it will select 1/750s if it's trying to expose between 1/500 and 1/1000 (although it will likely round up or down in the VF). I'm afraid there's no way of keying in that shutter speed manually, though. 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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11-09-2011, 08:05 PM	#3
Swift1 Veteran Member Join Date: Sep 2009 Location: Oregon Photos: Gallery \| Albums Posts: 5,079	Originally posted by JayH In aperture priority mode I took a shot at 1/750th. There is no click on the shutter dial to get this speed? Is there any way to manually achieve the 1/750th? What other speeds can you get using aperture priority aside from 750? I have only run a couple of rolls of film through my camera and just noticed this on the imprinted data. Thanks I could be wrong but, I think the 645N will use half stop shutter speeds in P or Av mode. 645NII will do third stops I think. I'm pretty sure you can only use full stops in M mode.