How do split screen and microprism focusing screens work?

bertwert · 04-23-2016, 03:02 PM

I saw this video today and I see how to use these screens and how useful these would be, but how/why do the do that?

A Demo of Split Screen and Microprism Ring Focusing in Old SLRs

stevebrot · 04-23-2016, 03:17 PM - **4 Likes**

This is one of the best explanations I have read. It also covers the basics of PDAF AF...

http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf

Steve

**Quartermaster James** · 04-23-2016, 08:52 PM

Originally posted by stevebrot

This is one of the best explanations I have read. It also covers the basics of PDAF AF...

http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf

Steve

That is EXCELLENT!

Thank you!

**Baard-Einar** · 04-24-2016, 02:26 AM

Originally posted by stevebrot

This is one of the best explanations I have read. It also covers the basics of PDAF AF...

http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf

Steve

Thanks, good stuff

bertwert · 04-24-2016, 06:46 AM

Originally posted by stevebrot

This is one of the best explanations I have read. It also covers the basics of PDAF AF...

http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf

Steve

Thanks!

04-23-2016, 03:02 PM	#1
bertwert Veteran Member Join Date: Jun 2015 Location: Golden, BC Posts: 15,173	How do split screen and microprism focusing screens work? I saw this video today and I see how to use these screens and how useful these would be, but how/why do the do that? A Demo of Split Screen and Microprism Ring Focusing in Old SLRs

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04-23-2016, 03:17 PM - 4 Likes	#2
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	This is one of the best explanations I have read. It also covers the basics of PDAF AF... http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf Steve

04-23-2016, 08:52 PM	#3
Quartermaster James Loyal Site Supporter Join Date: Oct 2014 Location: Anchorage, Alaska Posts: 653	Originally posted by stevebrot This is one of the best explanations I have read. It also covers the basics of PDAF AF... http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf Steve That is EXCELLENT! Thank you!

04-24-2016, 02:26 AM	#4
Baard-Einar Site Supporter Join Date: Jan 2010 Location: Oslo Photos: Gallery Posts: 964	Originally posted by stevebrot This is one of the best explanations I have read. It also covers the basics of PDAF AF... http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf Steve Thanks, good stuff

04-24-2016, 06:46 AM	#5
bertwert Veteran Member Join Date: Jun 2015 Location: Golden, BC Posts: 15,173 Original Poster	Originally posted by stevebrot This is one of the best explanations I have read. It also covers the basics of PDAF AF... http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf Steve Thanks!

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