Re: Who killed infinity focus?

2015-03-21 Thread Daniel J. Matyola
On Sat, Mar 21, 2015 at 7:01 PM, P.J. Alling wrote: > The method often suggested to get the absolute best focus using a manual > focus zoom, was to focus zoomed in then zoom out and re-frame at the desired > magnification. The plane of focus stayed the same. I remember doing exactly that. Dan M

Re: Who killed infinity focus?

2015-03-21 Thread P.J. Alling
The method often suggested to get the absolute best focus using a manual focus zoom, was to focus zoomed in then zoom out and re-frame at the desired magnification. The plane of focus stayed the same. On 3/21/2015 5:50 PM, Larry Colen wrote: I'm inclined to suggest that: The precision for an

Re: Who killed infinity focus?

2015-03-21 Thread P.J. Alling
With the advent of auto focus varifocal zooms have become more the norm, even though the shift is often small, in previous eras, the mark of a good zoom was that it didn't shift the focus plane as it zoomed, unless it was specifically noted. On 3/21/2015 5:21 PM, Ralf R Radermacher wrote: Am

Re: Who killed infinity focus?

2015-03-21 Thread Larry Colen
I'm inclined to suggest that: The precision for an accurate infinity focus increases the costs of a lens. May not be possible on a zoom lens. Manual focus is not used by the vast majority of people who buy cameras, so it's added cost for a feature that is useless to most of the customers who c

Re: Who killed infinity focus?

2015-03-21 Thread Ralf R Radermacher
Am 21.03.15 um 18:26 schrieb P.J. Alling: Reading it right now, interesting and I'm still not sure how much is marketing bullshit. http://www.bhphotovideo.com/explora/photography/features/who-killed-infinity-focus?BI=4906 Really interesting. Thanks for the link. Not sure what to think o

Re: Who killed infinity focus?

2015-03-21 Thread Ralf R Radermacher
Am 21.03.15 um 22:15 schrieb Larry Colen: I have often wondered if some zoom designs shift their point of focus at different focal lengths. They definitely do. Otherwise one couöd zoom in, focus much more precisely and zoom out again. You'll admit that this would be far too easy... Ralf -

Re: Who killed infinity focus?

2015-03-21 Thread Larry Colen
P.J. Alling wrote: Reading it right now, interesting and I'm still not sure how much is marketing bullshit. http://www.bhphotovideo.com/explora/photography/features/who-killed-infinity-focus?BI=4906 With the level of electronic communication between the lens and the body, there

Re: Who killed infinity focus?

2015-03-21 Thread Bulent Celasun
://www.pentaxphotogallery.com/artists/bulentcelasun 2015-03-21 19:26 GMT+02:00 P.J. Alling : > Reading it right now, interesting and I'm still not sure how much is > marketing bullshit. > > http://www.bhphotovideo.com/explora/photography/features/who-killed-infinity-focus?BI=4906 > > -- > I don

Re: Who killed infinity focus?

2015-03-21 Thread Tom Reese
much is > marketing bullshit. > > http://www.bhphotovideo.com/explora/photography/features/who-killed-infinity-focus?BI=4906 > > -- > I don't want to achieve immortality through my work; I want to achieve > immortality through not dying. > -- Woody Allen > > >

Who killed infinity focus?

2015-03-21 Thread P.J. Alling
Reading it right now, interesting and I'm still not sure how much is marketing bullshit. http://www.bhphotovideo.com/explora/photography/features/who-killed-infinity-focus?BI=4906 -- I don't want to achieve immortality through my work; I want to achieve immortality through not dying