Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: LarryFRCGP on February 11, 2007, 09:18:06 am

Title: Crop factor for Rollei6008AF + dp20 back
Post by: LarryFRCGP on February 11, 2007, 09:18:06 am

What is the crop factor for the digital back, if any?

Thanks,

Larry

Title: Crop factor for Rollei6008AF + dp20 back
Post by: BJNY on February 11, 2007, 10:37:17 am

1.5x
e.g. 50mm lens translates into 75mm perspective;  80mm lens translates into 120mm perspective.

P20 sensor is 37mm x 37mm physical size.  Live area of 6x6 camera is approximately 55mm x 55mm.

Title: Crop factor for Rollei6008AF + dp20 back
Post by: pss on February 11, 2007, 01:29:33 pm

used to have that kit...wonderful...great camera, great back...amazing lenses...if you are used to looking trough the finder (meaning if you have a rollei system) it might be hard to give up the full coverage....but the finder image you get is still much bigger and brighter then any DSLR....
as far as the lenses go: i always thought about them in terms of slightly shorter 35mm lenses (since i usually cropped 3:4)...so the 80mm becomes a 70-75mm (35mm) lens....
only real drawback: no real wide angle lens....the 40mm becomes a 35mm (in 35mm terms)....
hope this makes sense....

Title: Crop factor for Rollei6008AF + dp20 back
Post by: LarryFRCGP on February 12, 2007, 10:24:24 am

thanks.

I agree, all lens become "longer" with the digital back...but using that 800mm for portrait will be a charm...

Will post some pics when the kit comes to my door.

Larry

Title: Crop factor for Rollei6008AF + dp20 back
Post by: LarryFRCGP on February 12, 2007, 10:25:15 am

sorry, I mean 80mm lens , not 800mm!!

Larry

Quote

thanks.

I agree, all lens become "longer" with the digital back...but using that 800mm for portrait will be a charm...

Will post some pics when the kit comes to my door.

Larry
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