> Hello Al, Well it all depends . . . do you use the brighter Acute Matte screens, do you ever plan on upgrading to the 203FE or 205TCC/FCC, do you wear glasses, do you use or need spot metering, do you work in the 'EV' exposure system and do you have a limited budget.
If I HAVE TO MAKE THE DECISION FOR MYSELF, I would buy the PME45. I wear glasses and NEED its built-in diopter adjustment. I do use spot metering AND incident metering. I prefer not working in 'EVs' and I do use a 203FE and 205TCC. The PME45 is also very nicely buttoned and you can, with practice, easily change its settings WITHOUT taking your eye from its eyepiece.
Why would I want a metered prism on a metered body? I like the ability to use all my accessories on every camera. I don't have the PME45, but I wish I do!
Now, the major features:
PME - old and requires recalibration for the Acute Matte screens PME3 - already recalibrated for Acute Matte screens PME5 - compatible, i.e., won't damage the 203FE or 205TCC/FCC bodies PME51 - just a newer version of the PME5, don't know what the actual differences are.
Note that the PME5 and PME51 finders have a double-blue line on their housing - I guess to show that they're compatible with the 203FE and 205TCC/FCC cameras.
All these finders show the correct exposure with EV numbers!
PME45 - incident/spot metering, exposures in standard f/stops and shutter speeds and diopter adjustment, but I believe its magnification is slightly LESS than that of the earlier finders (maybe 2x vs 2.5x).
Of course, the earlier ones are less expensive, but remember that a PME may be the cheapest, it WILL require recalibration to work correctly with the brighter Acute Matte screens. You can use it by de-rating the ASA speed setting of the film that you use.
If there is ANY possibility of you upgrading to the later metered bodies (203FE or 205TCC/FCC) you won't need to buy another 45 degree finder IF you elect to buy the PME5, PME51 or PME45 from the get-go. You just ignore the finder's built-in meter - though you can use the PME45's spot metering with the 203FE body which only has a center-weighted meter. The 205TCC/FCC is spot metered. In any case the incident meter MAY come in handy with certain subjects.
Hope this helps. >