The disadvantages of the ZX-M is that it uses a Pentamirror instead of a
pentaprism. This is not as bright, so Pentax made the image smaller (.77x
magnification) to make up for this. Another disadvantage to the
pentamirror is that dust can get inside, but it's pretty easy to clean on
the ZX-M. However, the ZX-M screen is designed to make focusing with
smaller apertures easy. The focus aids don't black out until about F8, so
it's a breeze to focus a F4 or F5.6 lens on the ZX-M compared to older
cameras like the ME. This may be an advantage when using M42 lenses on the
camera.
Todd
BTW, Zenit still makes a M42 SLR, available new. However, you'd probably
be better off doing a CLA to your screw mount Pentax's.
At 08:10 AM 6/23/01 +0200, you wrote:
>Listen all,
>
>As some of you will know by now I have a considerable investment in M42
>lenses, both Takumars and aftermarket types. Many of these lenses are
>really excellent and fully as good as my Nikkors so I have absolutely no
>desire to get rid of them. But the M42 bodies are getting a bit long in the
>tooth now. My only surviving Spotmatic F is still OK and so is my S1a but I
>have been using the M42 lenses with the screw to bayonet adaptor on both the
>MX and the Program-A.
>
>A while ago there were several posts on this group about the viewfinder of
>the MZ-M to the effect that somehow it was not all that good. From what I
>can recall, nothing much was said about what the defects actually were. I
>have had a look at an MZ-M with the view to getting one as a replacement for
>my Spotmatic-F (in case it should pack up). This means of course that I
>will use the screw adaptor on the MZ-M a small price to pay for the lens
>quality which I already have. But what is the actual problem with the MZ-M
>viewfinder? I had a look through one recently and I could not see anything
>special, but then in actual use maybe somethings turn up which make it
>unsatisfactory in use. I do wish that the MZ-M was not battery-everything
>powered. This is the main reason why I have never gone over seriously to
>autofocus. But there appear to be no serious replacements for the M42
>cameras to-day. I already have a Praktica MTL50 and it seems fine but of
>course it's not a Pentax.
>
>Conrad F. Samuels
>Kirstenhof SA
>[EMAIL PROTECTED]
>
>
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