Using Phase One Blue Ring Lenses On XT And Cambo Tech Cameras

[Greg Haag]

Greg, can we get a look at the raw from the 120? I was asking my dealer about using that lens with my RM3di. He said an adapter is available, but the lenses have zero usable image circle beyond the IQ4 sensor. I guess "usable" is a matter of personal taste. For example, I dislike shifting much more than about 12 mm with any of the older Rodies (eg my 40HR) though, of course, they will go further. So what I want to get a feel for is how the 10 mm shift quality compares between the 120 LS and the 120 apo sironar. The 120 apo has all sorts of aberrations when you get to the edges but, at 10 mm, an edge/center comparison is pretty good.

It seems that outer circle consistency may be one of the advances on the float Rodenstocks. From images I have seen (thanks @Dave Chew) they stay clean - even to the edge of the specified circle. Not used to that with the older lenses.

Sure, it is currently set at f4, does that work for your purposes or do you need a different fstop?

 

[cunim]

Doesn’t matter if it’s good at f4 it will be at least as good at f8. Thanks

 

[ASTeamwork]

This is really great to know, thanks @Greg Haag

 

[Greg Haag]

Doesn’t matter if it’s good at f4 it will be at least as good at f8. Thanks

Sorry for the delay, I just got back in town. I tried to expose these as far to the right as possible without clipping to provide you as much detail as I could. The dropbox links to the raw files are below.

No shift
https://www.dropbox.com/s/yx2yxhyg0yuzufy/P0007566.IIQ?dl=0

10 right & 10 left
https://www.dropbox.com/s/hppr35sbavbyokr/P0007567.IIQ?dl=0
https://www.dropbox.com/s/wnbbyznnx7swk50/P0007568.IIQ?dl=0

 

[cunim]

Greg, thanks very much for making these available. The 120 is a spectacular lens but, I would have to say, using it shifted is not to my taste. Is it your opinion that you would get better lateral image quality just using the 55 or 80? Unless you need the compression, of course.

 

[Greg Haag]

Greg, thanks very much for making these available. The 120 is a spectacular lens but, I would have to say, using it shifted is not to my taste. Is it your opinion that you would get better lateral image quality just using the 55 or 80? Unless you need the compression, of course.

Honestly, the 120 (blue ring) was my least favorite of the lenses I tested, it did not seem as sharp as I expected. My 55 (non-blue ring) is better. If I needed compression, my 150mm (non-blue ring) would be my preference over the 120mm.

 

[cunim]

Honestly, the 120 (blue ring) was my least favorite of the lenses I tested, it did not seem as sharp as I expected. My 55 (non-blue ring) is better. If I needed compression, my 150mm (non-blue ring) would be my preference over the 120mm.

How interesting. I have not really tried the 120 at distance and am sorry to hear it underperforms. At macro and near macro repro ratios this thing is at least equal to my apo sironar 120M. If anything, it is slightly sharper. However, the Phase 120 has no movements so I won't be dumping the Rodi macro anytime soon - even though that loads up edge aberrations when moved more than a little. What I would really like is for Rodenstock to make a new generation macro in the 100-140 range, with a decent IC. Sadly, the 105 float, (80mm IC) is pretty much useless for someone like me.

 

[Greg Haag]

Honestly, the 120 (blue ring) was my least favorite of the lenses I tested, it did not seem as sharp as I expected. My 55 (non-blue ring) is better. If I needed compression, my 150mm (non-blue ring) would be my preference over the 120mm.

How interesting. I have not really tried the 120 at distance and am sorry to hear it underperforms. At macro and near macro repro ratios this thing is at least equal to my apo sironar 120M. If anything, it is slightly sharper. However, the Phase 120 has no movements so I won't be dumping the Rodi macro anytime soon - even though that loads up edge aberrations when moved more than a little. What I would really like is for Rodenstock to make a new generation macro in the 100-140 range, with a decent IC. Sadly, the 105 float, (80mm IC) is pretty much useless for someone like me.

The 120mm performs well at all distances on my XF, I really expected the same on the Cambo. I am not really sure what the reason is, but it is not a big issue for me the 55mm and 80mm were my primary reasons for buying the adapter.

 

[Digitalcameraman]

Greg,

I would think the 120mm would b the same on the XF and the WRS Adapter. Maybe you were getting more vibration with the longer focal length and extra weight of that lens. I tested that 150mm BR 2.8 which is a beast and the 240BR and they both were stellar. Thanks for your testing and feedback.