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Forum: Pentax DSLR Discussion
01-26-2011, 12:06 PM
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Is there an adapter available for me to use my Pentax 6x7 lenses on my K10D? I realize I won't be able to use auto-focus, but I am curious if it's possible to mount them up.
Thanks!
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Forum: Pentax Medium Format
01-26-2011, 12:05 PM
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Is there an adapter available for me to use my Pentax 6x7 lenses on my K10D? I realize I won't be able to use auto-focus, but I am curious if it's possible to mount them up.
Thanks!
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Forum: Pentax DSLR Discussion
07-13-2007, 04:51 PM
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Yes, I have three lenses for my Pentax 67II.
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Forum: Pentax DSLR Discussion
07-12-2007, 03:45 PM
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So, 90mm (6x7 lens) x 2.875 = 258.75mm
Right?
Thanks to everyone again.
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Forum: Pentax DSLR Discussion
07-12-2007, 03:32 PM
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THAT was NOT my question!
I realize that a 90mm lens designed for a 6x7 camera "appears" the same as a 90mm lens designed for a DSLR.. I am asking about mounting a 90mm lens designed for my Pentax 6x7 mounted on a DSLR with an APS-sized CCD image sensor (such as the K10D.)
I truely appreciate everyone's help and patience...
Let me try asking this way...
If I put a 50mm lens designed for a 35mm camera on a DSLR with an APS-sized CCD image sensor, I no longer have as wide a field of vision. effectively, the 50mm lens has become a 75mm lens.
Correct?
So, what happens when I mount a 6x7 90mm lens on a K10D using the S-mount adapter, of course.
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Forum: Pentax DSLR Discussion
07-11-2007, 03:01 PM
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QUOTE: "Your 90mm 6x7 lens would have a fov of ~18deg on a asp-c digital. A similar FOV to a 135mm on a 35mm or 270mm on a 6x7." -import silvia
I may not have asked my question very clearly, but, if I put my Pentax 6x7 90mm lens on the K10D, it would have the equivalent frame as a 270mm lens as compared to a 35mm "film camera."
So if I multiply the 6x7 lenses by three, I would get their approximate "equivilant" to 35mm format?
And, conversely, that would make a "normal" lens on the K10D about a 30mm lens?
Correct?
Thanks!
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Forum: Pentax DSLR Discussion
07-11-2007, 12:34 PM
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I'm a bit confused how you arrived at that "conversion."
Maybe I didn't really word my question properly, let me try again...
A "normal" 50mm lens on a K10D (with the APS-sized CCD image sensor) produces an image similar to having a 75mm lens on a camera with a full frame sensor.
So, what would a Pentax 67 90mm (standard lens for a 6x7 format camera) be equivilant to? I would assume it would be, effectively, more like a telephoto lens on an APS-sized CCD image sensor.
Does that make sense?
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Forum: Pentax DSLR Discussion
07-11-2007, 10:34 AM
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Does anyone know what magnification factor a 6x7 (medium format) lens would have on the K10D?
I realize that 1.5x is the "effective magnification" on 35mm format lenses; but what about medium format lenses?
Thanks!
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