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KennyJ
Reged: 04/27/03
Posts: 10146
Loc: Lancashire UK
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Re: Resolution and phase-correction
02/14/07 11:30 AM
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Hello Andrew ,
I suppose this depends on what you mean by " HIGH " resolution .
The only roof prism binoculars I have are phase corrected .
As you possibly know , Zeiss introduced phase coating to roof prism binoculars , IIRC , in the late 1980s.
The reason given was to improve CONTRAST and RESOLUTION .
It didn't take long for the other leading manufacturers to follow suit .
Hundreds of experienced binocular users would seem to be in total agreement about the fact that phase correction DOES indeed improve the quality of image seen through roof prism binoculars , so from that , I can only presume that no matter how " high " resolution can be achieved through NON phase coated roofs , it will not be as high as WITH phase correction , or as high as is achieved by good quality Porro prisms .
Regards , Kenny
--------------------
If everyone is thinking the same thing , no-one is thinking - General George S.Patton
Zeiss 7 x 42 BGAT
Captain's Helmsman 7 x 50
Nikon 10 x 42 Superior E
Swift Audubon Kestrel 10 x 50
Helios 15 x 70 Observation
Strathspey 20 x 90
Televue 76 APO
Zeiss 85 Diascope
Helios 102 f5 refractor
Various eyepieces barlows tripods mounts etc.
Panasonic Lumix DMC - TZ5 digital camera
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