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10-16-2017, 08:42 AM   #1
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Crop factor or cr.. factor ?

I first used a 90s 35-70 on a Sony , bought for its CCD sensor and for that lens , plus a 35mm .

Moving forward , I acquired a 90s Pentax 35-70 for my K-S1 with 35mm , which enjoys a much clearer finder .

Absolute IQ is not an issue for me , so these budget lenses suit me perfectly .

The fact is that the nominal 52 *mm-105 is just perfect for my architectural and car snapshots, even from a car photos .

I also have glitches which means that this combination eliminates the sense of distortion which make me uneasy with wider angles .

The 35-70 also finds a home with the CCD Sony sensor of my K10D .

Has anyone found a preferred combination post crop factor , from older lenses ?

dee


Last edited by deeslexia; 10-18-2017 at 12:32 AM. Reason: Mistake corrected .
10-16-2017, 10:12 AM - 2 Likes   #2
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35-70 on APS-C is 52.5-105, not 46-105...30mm on APS-C is equivalent to 45mm on FF...

Crop factor should be ignored unless you want to compare a smaller format to full frame. Learn how a focal length behaves on the format you are using.
10-16-2017, 05:03 PM   #3
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My really cheap Tamron 70-300 on APS-C gives me a field of view (and aperture) that was basically unthinkable for me in the 1990s, especially for the price.

And the Zenitar 16mm fisheye on APS-C is interesting, with lots of distortion (no surprise) in a no-longer-terribly-wide package.

I also have a Miranda 24mm f2.8 that's a pretty fair walk-around lens on APS-C, and a nice match for the K-01.

My list of lenses I prefer on full frame is longer, though

-Eric
10-18-2017, 12:35 AM   #4
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Sorry boriscleto.
I should know that conversion as nom 50m is still my favourite focal length - from 1972 with an SLR with 'standard' 50mm lens , though I did move to 45mm and subsequently 40.5 with a Fuji X-Pro 1 .

I also used a 135 f3.5 wide open on infinity with my Panasonic L1 4/3rds at our local Biggin Hill air shows , until the wafer thin adapter became stuck and had to be prised off .

A135 f3.5 is such a light 270 on APSc , though I would not like to try and focus manually .

dee

10-18-2017, 06:44 AM   #5
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I use the A 135/2.8 on APS-C. I don't have any problems focusing, but I'm not shooting airplanes...

I also use the 18-135 as my walk around, if I used Nikon I'd probably be using the 18-140...a 28-200ish equivalent is all I need when I'm not carrying the 150-500...Unless I need the 10-20 or the 100 macro...
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