The lens aperture can be anything that you can actually design to.

The larger the maximum aperture the brighter the picture you get in your viewfinder and the more critical is the focusing of the lens due to the reduced DoF.

The probability is that f1.7 was more favourable for the actual lens computation, when came down to it.

Absolutely pleased with the results and the camera!

I used a MZ-M for about ten years. I have had no problem with the plastic mount although I was surprised that it was plastic, whereas the 35-80mm zoom that came with it had a metal mount.

The camera has fully programmed mode, Av mod, Tv mode and full manual mode, with shutter speed and f-stop setting displayed in the viewfinder window. Exposure compensation and depth of field preview.

A great little camera in my view.

The one(s) you have, I guess!

I have had one for about twenty years. The exposure compensation on the MG works as follows:

Pull and lift the rewind knob gently to the stop. This will reveal the exposure compensation dial underneath. Do not pull further or the camera back will open.
Lift and move the ASA setting dial to the red + or - markings on the revealed exposure dial for the amount of compensation you require.

Push the rewind knob back home.

The exposure compensation dial really only tells you which way to turn the ASA setting dial - anticlockwise for more exposure, clockwise for less exposure, looking from the top at the camera.

If you know which way to turn the ASA setting dial anyway, then just lift and turn it for the setting you want, without going through the above procedure.

Don't forget to set it back to the normal film ASA/ISO rating after you have taken the compensated exposure.

Lenses are commonly described as, for example 1:2 This means that the lens is f2 max aperture. Can be misinterpreted as f1.2

My Tokina Pentax fit lens is engraved "24mm 1:2.8" ie 24mm focal length f2.8

My Pentax Std lens "1:1.7 50mm" (came with the ME Super)

My Pentax Std lens "1:2 50mm" (came with the MG).

Given the angle of view for the diagonal, work it out by proportion for the width and height of the frame format, if you need that info!

For 35mm frame: Diagonal = 43mm, height = 24mm, width = 36mm

Given the angle for diagonal = 84 degrees (24mm lens)

Angle for width = 36/43 x 84 = 70 degrees.
Angle for height = 24/43 x 84 = 47 degrees.

For the other lenses substitute the lenses' diagonal angle in the formula above.

Thanks for the welcome, Judith.

Got it!

Thanks again, Stefan.

Thanks, Stefan. I tried the above with an image of mine on ephotozine.com

I copied the url address and image number from my portfolio and clicked the image button.

In the comment it added a box with a cross in it.

On clicking on the box the image appeared with the ephotozine stuff around it, not just the picture.

However, I will have another go following your instruction implicitly.

Thank you again.

Just missed one at a price I was prepared to pay.

I can wait!