Jump to content


Photo

Sharpest 85mm legacy lens


  • Please log in to reply
72 replies to this topic

#61 nomad

nomad

    Advanced Member

  • Members
  • PipPipPip
  • 120 posts

Posted 30 April 2016 - 05:42 PM

Advertisement (Gone after free registration)

Made a quick test now and my Sony zoom and my Minolta 200mm, both at f4, are very close in resolution. The Sony has a tad more contrast and the Minolta some CA.

 

Very, very close, even when pixel peeping for technical parameters – of course not in style.



#62 Wally The Confused

Wally The Confused

    Advanced Member

  • Members
  • PipPipPip
  • 37 posts

Posted 03 July 2016 - 12:29 PM



Sorry, I was a bit hasty and went by the title only.

 

The beautiful Minolta 85mm f 1.7 used to be under 200. But I'm afraid with the success of Sony's A7 line all this is going to change and I'll have to up my insurance – I got a complete line of Minolta and Zeiss C/Y glass when there was only MFT to adapt it to. When I checked some prices recently, I found out that this was one of the best investments in my life…

 

Hi I bought my 85mm 1.7  back in 73, Used it on an xe 1 til it broke,  recently got an adapter for it . as  shown

 

15-October-14-lens-007_zpsea5jgw3v.jpg

 

I have not found much info on the lens lately, so, are you saying it is now a valuable  lens  ?



#63 nomad

nomad

    Advanced Member

  • Members
  • PipPipPip
  • 120 posts

Posted 04 July 2016 - 07:30 AM

Well, technically it's quite soft WO, portraits look a bit like fashion photos from the sixties. But it's getting pretty sharp when stopping down. It's famous for it's bokeh and the excellent quality of mechanics.

 

More info in English here: http://www.rokkorfil...ns Reviews.html

 

And very detailed info in German on: http://artaphot.ch/m...ta-sr/objektive

 

But I think it's a bit overrated on the second hand market these days. 



#64 Wally The Confused

Wally The Confused

    Advanced Member

  • Members
  • PipPipPip
  • 37 posts

Posted 04 July 2016 - 01:08 PM

Thanks for your  reply, I can see my memory is failing me. I was positive it was 1973 when I bought the lens new.

However, it was not released until  1978 . Sorry !  ( Could a moderator correct my post , if possible  ? )

Thanks



#65 finarphin

finarphin

    Member

  • Members
  • PipPip
  • 21 posts

Posted 05 July 2016 - 05:21 AM

Besides sharpness, cost, and maximum f-stop, there might be a couple of other parameters to consider.I'm thinking of how easy it is to focus, and does it have focus shift.I'm still looking for a lens in about this focal length, and the three that I have tried have all been hard to focus (on a film camera) and exhibit focus shift -- I can tell there is focus shift because I can use focus assist to focus at f2, and then when I stop down to f5.6 and take the picture the resulting image isn't sharp where I had it.



#66 nomad

nomad

    Advanced Member

  • Members
  • PipPipPip
  • 120 posts

Posted 05 July 2016 - 09:50 AM

How precise is your adapter?



#67 Golem

Golem

    Advanced Member

  • Members
  • PipPipPip
  • 1,249 posts

Posted 05 July 2016 - 03:27 PM

How precise is your adapter?

  

That is not going to cause focus shift.

  

An adapter that is not on-axis will cause a shift

if you focus on one side of the frame and then

reframe the subject over to the other side. This

would happen even if you focus at the working

aperture. If focus changes in that manner, that

is not actually "focus shift", which refers to the  

focus shifting due to stopping down.

  

But if you focus and don't reframe, you can still

get a shift from the lens itself, same shift you'd

get even with a perfect adapter. If the adapter

has an incorrect flange distance, but is on-axis,

that will NOT cause a focus shift. It will cause

an inaccurate reading on the focus scale, but

focusing at wide open will remain correct when

stopped down unless the lens has a focus shift. 

  

Focus shift is usually due to poor placement of

the iris along the optical axis.



#68 EDBR

EDBR

    Advanced Member

  • Members
  • PipPipPip
  • 82 posts
  • LocationBelgium

Posted 19 October 2016 - 01:42 PM

Long time I've been around on this topic

 

So Nomad

 

regarding what you say

 

"Made a quick test now and my Sony zoom and my Minolta 200mm, both at f4, are very close in resolution. The Sony has a tad more contrast and the Minolta some CA."

 

Could you send me some corner performance of your Sony 70-200f4, because or you have a very good sample or I've got a very bad sample or something in between of the two...^_^



#69 nomad

nomad

    Advanced Member

  • Members
  • PipPipPip
  • 120 posts

Posted 19 October 2016 - 08:28 PM

I hope I'll remember when I come back from working in another city on the weekend. Maybe you can drop me a PM on Saturday?



#70 nomad

nomad

    Advanced Member

  • Members
  • PipPipPip
  • 120 posts

Posted 23 October 2016 - 07:53 PM

Weather was awful yesterday, but I did another little test, two church towers close to infinity. My observations in the corners (centers are great with all three):

 

– The Minolta is very sharp from f4, but has darkened corners and quite some CA. The vignetting is gone when stopping down, the CA not.

 

– My Sony at 200mm has hardly any CA and vignetting, but is not as sharp by a relatively small margin – choose your poison.

 

I also compared a Zeiss Contax 180mm f2.8, which shows no vignetting, but quite a bit of CA too and it's even a tad softer in the corners than the other two, but then it is one stop faster after all.



#71 Jaf-Photo

Jaf-Photo

    Advanced Member

  • Members
  • PipPipPip
  • 195 posts

Posted 29 October 2016 - 10:24 PM

Some nice lenses being discussed here. I'm particularly pleased someone brought up the Mamiya 150/3.5, which is a beautiful lens. One suggestion, though: please mention which versions of lenses you are discussing. I don't know if you're talking about the Minolta MD 200/4 or Minolta AF 200/2.8 above.



#72 asterinex

asterinex

    Member

  • Members
  • PipPip
  • 16 posts

Posted 11 November 2016 - 08:52 AM

C/Y Zeiss Sonnar 85/2.8 is the one you need !



#73 EDBR

EDBR

    Advanced Member

  • Members
  • PipPipPip
  • 82 posts
  • LocationBelgium

Posted 11 November 2016 - 11:01 AM

Can confirm what asterinex says, very good performance indeed.

Center super sharp at f2.8

Corners very good from f2.8, and by f5.6 super sharp like center. 

But a rather sensible to flare (and yes is a MM). 




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users