which lens on FF is equivalent to medium format/80mm?

I'm looking to buy a lens for a FF camera but I would like to know which lens can achieve the same effect as JoeyL's picture on the right? I would like to achieve the same bokeh background, the face only in focus and everything else out of focus.

My guess: 50mm

http://www.joeyl.com …10/06_quick_por​tfolio.jpg

the exif data says hes using a phase one with an 80mm lens. Your not going to be able to reproduce Medium format photos without buying a medium format camera. A 85mm prime will give the same separation, but it wont look the -same-

Or doing those Brenizer photos that are just too much work, I guess.

shiftonephoto wrote in post #13951339
the exif data says hes using a phase one with an 80mm lens. Your not going to be able to reproduce Medium format photos without buying a medium format camera. A 80mm prime will give the same separation, but it wont look the -same-

pretty sure i could achieve similar result with a FF camera... this photo was taken with a neutral density filter and a single strobe. I just need to figure out which lens to use.

Well I'd try a 70-200. You're probably aiming for somewhere around 135mm wide open.

Maverique wrote in post #13951429
Well I'd try a 70-200. You're probably aiming for somewhere around 135mm wide open.

I was going to say this as well

Maverique wrote in post #13951429
Well I'd try a 70-200. You're probably aiming for somewhere around 135mm wide open.

what about the 135L?

The EXIF data says the photo was taken at 80mm and f/3.5 on a P45+ sensor which is 49.1 x 36.8 mm
http://www.akelstudio.​com …r-size-make-a-difference/

A Canon Full Frame 5D Mk II has a 36 x 24mm sensor, so by my calculations, a 57mm focal length and about f/2.5 would yield similar results.

msowsun wrote in post #13951645
The EXIF data says the photo was taken at 80mm and f/3.5 on a P45+ sensor which is 49.1 x 36.8 mm
http://www.akelstudio.​com …r-size-make-a-difference/

A Canon Full Frame 5D Mk II has a 36 x 24mm sensor, so by my calculations, a 57mm focal length and about f/2.5 would yield similar results.

thanks

A 50/1.2L used around f2 or so would be the closest to that effect.

Or if you have plenty of working space, you could move back a bit and use a longer, large aperture lens such as the 85/1.2L to get similar.

If you use a low enough ISO you might not need an ND filter... It looks like an overscast day, and possibly early or late in the day as well. Just set your shutter and aperture to slightly undexpose the ambient light of the background, then set the flash up to give a "correct" exposure on the subject.

only way to do it:
http://blog.buiphotos.​com …xplained-with-directions/

^- interesting... My question is isnt subject movement and such a problem with such a method?

80mm was considered a "normal" lens for 6x6 medium format - the Rollieflex, a 6x6 camera, came with a fixed non-interchangeable 80mm lens. This would be equivalent to 50mm on a 35mm or FF digital camera.

There are other "medium format" formats - 4.5x6, 6x7, 6x9 for example. I believe 100mm is considered "normal" for 6x9.

msowsun wrote in post #13951645
The EXIF data says the photo was taken at 80mm and f/3.5 on a P45+ sensor which is 49.1 x 36.8 mm
http://www.akelstudio.​com …r-size-make-a-difference/

A Canon Full Frame 5D Mk II has a 36 x 24mm sensor, so by my calculations, a 57mm focal length and about f/2.5 would yield similar results.

Mike, my own calculations

(using 645 size frame 42x55mm) 80mm lens f/3.6 at 20' will frame 11' tall area with 6.17' DOF zone

5DII with 41mm lens at f/1.4 at 20' will frame 11' tall area with 6.26' DOF zone.


While DOF zone will be similar, background blur will be significantly different!

tomj wrote in post #13953113
80mm was considered a "normal" lens for 6x6 medium format - the Rollieflex, a 6x6 camera, came with a fixed non-interchangeable 80mm lens. This would be equivalent to 50mm on a 35mm or FF digital camera.

There are other "medium format" formats - 4.5x6, 6x7, 6x9 for example. I believe 100mm is considered "normal" for 6x9.

But...

• Aspect ratio of MF digital is about 5:4 (vs. 3:2 for 135)
  
• 80mm was 'normal' for a square 55x55mm; 75mm was 'normal' for 55x42mm 645 format (a bit larger than Phase One digital back 49.1 x 36.8mm)
  
• The conventional 'normal' lens is 1.78x frame height for 645 format, but 2.08x frame height for 135 format cameras!