Crop factor......

specialman

specialman

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Pat MacInnes
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We all know about the whole crop factor changing the field of view of a lens to something different (longer). However, do you actually think of the 'old' 35mm lens lengths when looking for and choosing lenses, or do you think now in crop terms?

It's a funny one for me because I use lenses that are marked up as what they are (not what they're equivalent to) and therefore I choose the lens going by what's printed on it and what it will allow me to achieve - I never think to myself, 'oh, that would have been XXmm in 35mm times'.

It's something that crops up (pardon the pun) on here a lot, people referring to focal lengths in 35mm terms when they've used a lens designed for a crop body. Does it matter? Does it affect your photography?
 
I never think to myself, 'oh, that would have been XXmm in 35mm times'.

Ditto. I wouldn't buy a 70mm if I really wanted a 105mm just because I was on DX.

70mm is 70mm is 70mm.
 
Took a while but now I don't make any 35mm comparisons.

I guess it has become second nature, much like it did to folk who shot/shoot medium format and 35mm together
 
puddleduck said:
I never think to myself, 'oh, that would have been XXmm in 35mm times'.

Ditto. I wouldn't buy a 70mm if I really wanted a 105mm just because I was on DX.

70mm is 70mm is 70mm.
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I am the same, I use the lens that gets the shot I want, I cannot look at a scene and go oh that will need to be xxmm I just know roughly what lens I will need
 
I don't 70mm to me is 70mm, but then I can never quite see the point in people saying "oh, that length is xx on full frame so a bit worthless". For example 85mm, I want 85mm because I need something a tincy bit longer than 70, doesn't bother me that it is not the 'typical' full frame length when on a crop lens.

(I have only ever used a crop SLR though)
 
specialman said:
However, do you actually think of the 'old' 35mm lens lengths when looking for and choosing lenses?
Click to expand...

Yes. Because that's what I use.

I do sometimes do the maths in the other direction when using medium format.

e.g. My RB67 50mm lens is roughly equivalent to a 24mm lens on a 35mm camera.

It doesn't matter what type of camera the lens is fitted to, the actual focal length remains the same.


Steve.
 
I wish I had the lens collection to worry :baby:

For me if it's a standard focal length I want it's that lens, if it isn't then it's my other lens. If it's something a long way away, run towards it quick!

I like simple decisions :lol:
 
V8burble said:
I wish I had the lens collection to worry :baby:
For me if it's a standard focal length I want it's that lens, if it isn't then it's my other lens. If it's something a long way away, run towards it quick!
I like simple decisions :lol:
Click to expand...
Good take on it :)


Of course, this question only applies to people who use crop DSLRs
 
puddleduck said:
I never think to myself, 'oh, that would have been XXmm in 35mm times'.

Ditto. I wouldn't buy a 70mm if I really wanted a 105mm just because I was on DX.

70mm is 70mm is 70mm.
Click to expand...

I am the same tbh

always think of 300mm as 300mm, not whatever is is in crop terms
 
Oh yes that looks a good shot, now let me see if I use a 35mm lens on my full frame Canon, the A.O.V for a 36 * 24 sensor will be about right to get the cows in well here goes. Ye gad that once in a million shot has disapeared, oh !"%^&*+ it.
 
I have to switch between 1.3x and 1.6x (and FF when I'm shooting film) so I do need to think about it because my lenses won't have the same FOV on my cameras. 50mm is great for portaits on the 20D, but on the 1D I'd probably go for the 70-200mm.
 
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