Rule: Fine ground glass = bright image, difficult to focus Course ground glass = dim image, easy to focus
As in all such tradeoffs, you need to find the balance that works best for you. Ciao, Graywolf http://pages.prodigy.net/graywolfphoto ----- Original Message ----- From: "Frantisek Vlcek" <[EMAIL PROTECTED]> To: "PDML" <[EMAIL PROTECTED]> Sent: Monday, June 23, 2003 12:51 PM Subject: Re: Swapping screens across bodies > > I'm aware that LX and MX screens can be swapped > > across bodies (standard caveat: LX screen in > > MX body- add +1/3 to EV). > > > > Are the PZ-1P and MZ-S screens the same size > > and configuration? Are they brighter than > > the LX screens? > > -Lon > > Hi Lon, > the crosscompatibility is there, but not as great as you imagine. > > 1) LX screen #21 is worse in MX, because MX lacks the condenser lens > of LX. Depending on lens used, there is more or less vignetting. > With my 20-35/3.5-4.5 zoom, the vignetting made the lens unusable > on the MX with LX screen. Dunno about other screens. > > 2) MX screen in LX doesn't make sense, and it doesn't fit anyway > (it's teeney bit larger IIRC) > > 3) MX,LX screens don't fit in AF cameras, because AF cameras have > loose finders (92% coverage, while MX/LX have almost 100% coverage) > > 4) AF screens fit in MX,LX just finely. Sometimes this makes lot of > sense, with slower lenses. Or the MZ-M screen (C74) works in > MX,LX,AF just fine. It does have a split-image-aid which works down > to f/5.6-8 lenses (where already other screens split-image-aids are > hopelessly dark). But AF screens have lot lower microcontrast, > making critical focus with fast lenses harder than with manual > focus screen like the LX's. > > The MZ-M screen measured as about 1/3 brighter than the MX screen, so > I had to offset the ISO. But although it is brighter, it is harder to > focus as it does have much less microcontrast. Same for other AF > screens, they are all brighter than MX screens, but focus is quite > harder. So I find their usefulnes only for slow lenses or slow zooms > (remember, most consumer zooms are 4-5.6 apertures or even slower, so > the AF screens are made with this in mind, they are optimalised for > slow aperture. Old screens (especially K2 series and such) are > optimalised for fast lenses like 1.4/50. With the old cameras you can > really see the difference between 1.4 and 2 apertures. With the newer > its harder. > > Fra >
