Filed under: Pentax Digital SLR
I have a Pentax 50mm lens, a Sigma 70 - 200mm and a Sigma 500mm lens. They are all manual focus. I believe the mounting type is a Pentax K mount (bayonet fitting). Could I use them with the Pentax ist or somthing similar?
Yes you can.
If they are "A" series (an A on the aperture collar) you get full function (except autofocus). If no "A" then they are called "M" series and you can still mount and shoot, and have what's called stop-down metering
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A lot depends on the camera.
The basic K Bayonet has been upgraded by Pentax etc to incorporate auto-focus.
Some Digital SLRs will still allow you to use these lenses, but you need to check the exact model: New Bayonets Are Kaf Kaf2 and Ka, all of which add advance feature such as auto focus, and aperture control.
References :
Visit any Pentax webpage for more details as the new cameras come out
Your manual probably has a page - very near the back - showing which lenses are compatible and which features will or will not work.
References :
Yes you can.
If they are "A" series (an A on the aperture collar) you get full function (except autofocus). If no "A" then they are called "M" series and you can still mount and shoot, and have what's called stop-down metering
References :
Pentax Shooter for 3 yrs including 3 AF lenses, 3 M series, and 3 M42/screw mount series.