Focal Length vs Minimum Focusing Distance

[skarekrow24]

Hi, just want to clarify something.

Does minimum focusing distance(MFD) necessarily increase with higher focal lengths? (i.e. is there a relationship between the focal length and MFD?) I was of the impression that lens with further focal lengths require more MFD, but am not fully certain.

Can someone enlighten me on this subject?

Thanks in advance!

 

[ZerocoolAstra]

Hi, just want to clarify something.

Does minimum focusing distance(MFD) necessarily increase with higher focal lengths? (i.e. is there a relationship between the focal length and MFD?) I was of the impression that lens with further focal lengths require more MFD, but am not fully certain.

Can someone enlighten me on this subject?

Thanks in advance!

excluding the macro lenses, generally I would tend to agree with you. But I think many people here can find exceptions, so it's a moot point really.

* my 35, 50, 85 primes have progressively increasing MFDs, if that means anything to you.

 

[OoStarDustoO]

Hi, just want to clarify something.

Does minimum focusing distance(MFD) necessarily increase with higher focal lengths? (i.e. is there a relationship between the focal length and MFD?) I was of the impression that lens with further focal lengths require more MFD, but am not fully certain.

Can someone enlighten me on this subject?

Thanks in advance!

If you compare a 50mm F/2.8 macro vs a 50mm F/1.8, the MFD is different.

50mm F/2.8 macro - 20 cm
50mm F/1.8 - 34 cm

 

[skarekrow24]

excluding the macro lenses, generally I would tend to agree with you. But I think many people here can find exceptions, so it's a moot point really.

* my 35, 50, 85 primes have progressively increasing MFDs, if that means anything to you.

Yes, that was what I noticed too in general (excluding macro lens), but was not sure whether it's true.

If you compare a 50mm F/2.8 macro vs a 50mm F/1.8, the MFD is different.

50mm F/2.8 macro - 20 cm
50mm F/1.8 - 34 cm

Yes stardust, that what I expected for macro lens too.

I guess my question(more specifically) is if we keep all other variables constant (max aperture, manufacturer, etc), whether MFD will increase with higher focal lengths, e.g. 85f1.4 vs 50f1.4 vs 24f1.4.

I don't think it will really affect the way I shoot, its more a question out of curiosity.

 

[henry soh]

Hi, The wider the lens, say 10mm, the MFD should be as near to subject as possible for better effect of image and DOF.

 

[ovaltinemilo]

Hi, just want to clarify something.

Does minimum focusing distance(MFD) necessarily increase with higher focal lengths? (i.e. is there a relationship between the focal length and MFD?) I was of the impression that lens with further focal lengths require more MFD, but am not fully certain.

Can someone enlighten me on this subject?

Thanks in advance!

My old Nikkor 200mmf4 can focus at a mfd of 2metre. While a Nikkor 200mmf4 Micro can focus close to ~0.7m. Both are same focal length. It depends on the design.

 

[ZerocoolAstra]

Hi, The wider the lens, say 10mm, the MFD should be as near to subject as possible for better effect of image and DOF.

i don't understand what you're trying to say.

MFD is a fixed property of a particular lens.

"better effect of image and dof" ??? :dunno: