Originally posted by LesDMess Pentax M42 lens + adapter to kmount + MX. The M42 lens must have the auto/manual switch or I understand there are M42 to Kmount adapters that push the pin in. Focus and compose the lens then turn the aperture and adjust the shutter speed to match desired exposure.
Regarding: Pentax MX + M42/PK Adapter + M42 Lens.
Hi everyone! My Biotar 58mm f/2 - M42-mount Lens just arrived and I am very pleased to say that my initial fears when I ordered it, that it may not be easy to mount on my Pentax MX film camera, proved to be totally unjustified: this beautiful lens can be very easily mounted and dismounted on/off my camera, using the special key delivered together with the M42-PK adapter, which I also bought for this lens. Equally easy are the focus- and exposure-settings on this lens: you turn the front aperture- ring on the lens towards f/2, so that you have all the light you need when focussing, and then simply pull the same ring down, towards the camera-mount and set the desired f-stop, after which release the aperture-ring back; this will ensure that when you press the shutter button, the iris is locked at the desired f-stop value. Incidently, this is the so-called 3rd version (the “semi-automatic” version) of the lens, the first being the “Manual” one and the second the “Pre-set” one. Now I am going to order the adapter for my digital Fuji X cameras.