Well your wrong, because its a simple matter of depth of field, the more there is the harder it is to find the exact point of focus. I suggest you buy two of your magic cameras and put two lenses on them at the same time with same speed ( and quality )and compare which is easier to focus, the 35mm or the 105mm before you jump to the conclusion that they are exactly the same because they arent.
Secondly, & we have covered this before too, the ease of manual focus depends not solely on the brightness of the focus screen, its a combinaton of brightness and contrast related to the fineness of the grinding of the glass and the quality of the overall finder design with regards to flare. I have used SLR cameras with dimmer finders that are much easier to focus than cameras with brighter finders. Brightness alone means nothing. And even so, the quality of the finder will not change the DOF of the lens being focussed and thats where the 35mm vs 105mm focussing ease difference comes in. jco -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Shel Belinkoff Sent: Friday, November 10, 2006 3:26 PM To: Pentax-Discuss Mail List Subject: RE: Using a Super Tak w/ istDS Yes, for me, on the istDS, the ease of focus is similar at equal f-stops. I am not trying to say this, I am saying it. Try it yourself and see what your experience is. Many modern finders and screens are brighter than many older finders and screens. While i don't know the physics of it, I believe it has something to do with channeling a given amount of light through a smaller viewfinder, something, perhaps, akin to looking at a scene normally and then through a toilet paper roll core. When looking through the TP roll core, things appear more contrasty and sharper. Perhaps someone who knows how to better explain the physics of all this will jump in at some point. All I can do is tel you what my experience is. Shel > [Original Message] > From: J. C. O'Connell > Are you trying to say a 35mm f3.5 lens is > as easy to focus as a 105mm f3.5 lens? If > you are I strongly disagree and it has nothing > to do with the finder ( at least general purpose > finders like the ones found in most SLR/DSLRS ). > Newer cameras dont have magic finders that > change the laws of physics... -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
