Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-21-2015, 12:35 PM   #1
Veteran Member
PGillin's Avatar

Join Date: Apr 2010
Location: South Florida, USA
Photos: Albums
Posts: 337
MX Focusing Screens

Recently I had the chance to handle an MX, and really like the size and feel of it. So, I bought an MX and it's in the post, should turn up on Friday. Because it's smaller and lighter than the F2 I've been using, I'm expecting to carry it around more. The only thing that I'm not so enamored with is giving up the grid focusing screen my F2 has. To me the grid is very useful for composition, for measuring perspective distortion (I have a 17mm tamron I use frequently) and for the occasional multiple exposure.
I know that such a focusing screen, the SG-something, exists for pentax, but I'm not entirely clear on the compatibility of MX and LX screens. Are there any besides the SG's that have the grid, and what will be the practical effects of putting an LX screen in an MX?
Also, aside from ebay or the marketplace here, where would be a good place to look for the screen? Is it possible Erick would have/sell one? The MX might very well go out for a CLA in a few month's time anyways.

10-21-2015, 12:43 PM - 1 Like   #2
Pentaxian
pete-tarmigan's Avatar

Join Date: Apr 2009
Location: Conception Bay South, New-fun-land
Photos: Gallery
Posts: 1,007
QuoteOriginally posted by PGillin Quote
I know that such a focusing screen, the SG-something, exists for pentax, but I'm not entirely clear on the compatibility of MX and LX screens. Are there any besides the SG's that have the grid, and what will be the practical effects of putting an LX screen in an MX?
MX-LX focussing screens are completely interchangeable. This old Marketplace ad reproduces the brochure with all of the available screens for the MX and the LX:

https://www.pentaxforums.com/forums/36-sold-items/32637-sale-sold-pentax-mx-l...se-amp-sg.html

Edit: Oops. Those were the first 8 screens available when the MX came out. It looks like they released 17 screens for the LX, although many of those might be identical to MX screens, except slightly brighter:
http://kmp.bdimitrov.de/misc/focus/screens/

I bought the SG. I couldn't stand the original SC-1 (matte + split + microprism).

Last edited by pete-tarmigan; 10-21-2015 at 12:54 PM. Reason: additional info
10-21-2015, 01:36 PM   #3
Pentaxian
chickentender's Avatar

Join Date: Jan 2008
Location: Seattle, WA
Photos: Gallery | Albums
Posts: 1,993
QuoteOriginally posted by pete-tarmigan Quote
MX-LX focussing screens are completely interchangeable. This old Marketplace ad reproduces the brochure with all of the available screens for the MX and the LX:

https://www.pentaxforums.com/forums/36-sold-items/32637-sale-sold-pentax-mx-l...se-amp-sg.html

Edit: Oops. Those were the first 8 screens available when the MX came out. It looks like they released 17 screens for the LX, although many of those might be identical to MX screens, except slightly brighter:
Pentax Focusing Screens

I bought the SG. I couldn't stand the original SC-1 (matte + split + microprism).
I'm in the other camp. With the near 1:1 finder of the MX and LX, I very much like the matte/split/micro. Normally with less magnification I don't care for them.
10-21-2015, 05:48 PM   #4
Pentaxian
ChrisPlatt's Avatar

Join Date: Nov 2007
Location: Queens NYC
Posts: 4,864
FWIW Eric Hendrickson once told me no meter adjustment is necessary when using an LX screen in the MX.
Apparently any difference in light transmission is negligible.

Chris

10-22-2015, 06:34 AM   #5
Pentaxian
pete-tarmigan's Avatar

Join Date: Apr 2009
Location: Conception Bay South, New-fun-land
Photos: Gallery
Posts: 1,007
QuoteOriginally posted by chickentender Quote
I'm in the other camp. With the near 1:1 finder of the MX and LX, I very much like the matte/split/micro. Normally with less magnification I don't care for them.
I had to get away from the split/micro so that I could properly focus my Tamron Adaptall 300mm f5.6. Half of the split image and microprisms go black with such a slow lens. I can see how the split image focussing aid would be useful for macro.
10-22-2015, 07:48 AM   #6
Pentaxian




Join Date: Jan 2013
Location: Near Vienna, Austria
Photos: Gallery
Posts: 759
Back in my film days, I used an MX and an LX side by side (also a Super A and later a Z-1p). I put grid screens in all those bodies that offered the possibility (excluding the Super A). I did a lot of architectural shooting with the 28mm shift lens, which is how I got used to them, but came to prefer them over all other options. Although MX screens have the same dimensions as LX ones, I found that using the LX screen in the MX gave me very dark corners, if I recall correctly. Anyway, my conclusion was that it was no good. The reason is that the LX has a very different finder construction with the big lens between screen and pentaprism which the MX does not have. The screens are adapted to that. In a nutshell, the original MX screen is better in the MX.
A French seller has an SG screen on the big auction site right now for an acceptable price.
10-22-2015, 08:21 AM   #7
Veteran Member




Join Date: Mar 2015
Posts: 492
QuoteOriginally posted by pete-tarmigan Quote
I had to get away from the split/micro so that I could properly focus my Tamron Adaptall 300mm f5.6. Half of the split image and microprisms go black with such a slow lens. I can see how the split image focussing aid would be useful for macro.
Micro prisms and split images are each optimised for the lens characteristics but both will go dark with slow lenses away from their optimum.
10-26-2015, 10:02 PM   #8
Veteran Member
PGillin's Avatar

Join Date: Apr 2010
Location: South Florida, USA
Photos: Albums
Posts: 337
Original Poster
I'm contemplating that certain screen from that certain auction site, but is that really a good price?
Is it just because MX focusing screens are rare?

10-26-2015, 10:44 PM   #9
Pentaxian
chickentender's Avatar

Join Date: Jan 2008
Location: Seattle, WA
Photos: Gallery | Albums
Posts: 1,993
QuoteOriginally posted by PGillin Quote
I'm contemplating that certain screen from that certain auction site, but is that really a good price?
Is it just because MX focusing screens are rare?
This could start you down a different sort of road... but... I got the screen I wanted by purchasing another MX.
10-27-2015, 12:18 AM   #10
Veteran Member
PGillin's Avatar

Join Date: Apr 2010
Location: South Florida, USA
Photos: Albums
Posts: 337
Original Poster
QuoteOriginally posted by chickentender Quote
This could start you down a different sort of road... but... I got the screen I wanted by purchasing another MX.
Well, that's an option as well I suppose, but I'd end up selling one of them pretty quick.
Having too much space and money tied up in gear is no good
After all, part of the reason for getting the MX was that it might convince me to trade off the massive F2.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
f2, focusing screen, grid, grid viewfinder screen, lx, mx, screen, screens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
after-market focusing screens (Katz Eye, others) compared to manual film era screens Lititz Pentax DSLR Discussion 2 05-14-2014 06:47 AM
Focusing screens? MadMathMind Pentax K-5 17 12-29-2013 05:15 AM
For Sale - Sold: Pentax MX-LX Focusing Screens SE & SG oneill Sold Items 2 07-21-2008 11:14 AM
MX Focusing Screens straightshooter Pentax Film SLR Discussion 5 06-11-2008 12:24 PM
Help!! Focusing screens for MX Ferdy Pentax Film SLR Discussion 3 05-19-2008 05:15 PM



All times are GMT -7. The time now is 03:24 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top