HR Digaron S 4.0/60mm vs Apo-Sironar Dig. 4.5/55mm

[Edmund Sumner]

hi

I am looking at 2 options for a medium digital lens

these are Apo-Sironar Dig. 4.5/55mm  and the HR Digaron S 4.0/60mm

I shoot architecture stitch a lot and use a arca swiss with leaf aptus back (34mp)

which is the better lens and why

any advice greatly received

Edmund

[narikin]

read the image circles of these lenses:

the Digaron-S only just covers a digital MF sensor. very sharp but no stitching possible.
the Digaron-W range are made for modest stitching with an image circle just big enough for that

the Apo-Sironar Digital range has an even bigger image circle, for maximum stitching.
they are essentially lenses that were designed for film re-heated for digital.

you cannot have highest resolution + biggest circle, as one goes up, the other comes down.
choose whichever balance between these two suits you.

[paratom]

read the image circles of these lenses:

the Digaron-S only just covers a digital MF sensor. very sharp but no stitching possible.
the Digaron-W range are made for modest stitching with an image circle just big enough for that

the Apo-Sironar Digital range has an even bigger image circle, for maximum stitching.
they are essentially lenses that were designed for film re-heated for digital.

you cannot have highest resolution + biggest circle, as one goes up, the other comes down.
choose whichever balance between these two suits you.

you have some room when using the  HR Digaron S 4.0/60mm with a MF-sensor, but of course not as much as the Digaron-W.
I believe the 60 HR has an imagecircle of 80mm.

[archivue]

if you goal is shooting at F11 and stitching... then the apo sironar digital 55 is a bargain (low distortion !)
if you goal is shooting wide open without stitching, then the 60 HR is perfect
the W being maybe the best compromise...

[asf]

read the image circles of these lenses:

the Digaron-S only just covers a digital MF sensor. very sharp but no stitching possible.

Interesting. You've had trouble stitching when using the 60 digaron s? What happens?

[narikin]

Interesting. You've had trouble stitching when using the 60 digaron s? What happens?

huh? maybe you are not understanding this: the Digaron S range have a TINY image circle that is specifically designed to cover a single digital sensor area.
The image circle is NOT big enough for stitching, on any modern sensor there is almost nothing spare to stitch meaningfully with.

Rodenstock say precisely this in their brochure.

the only exception is if you are using some old generation much smaller than 645 sensor. then you might get 1.5 sensor fields out of it, but for modern sensors, and certainly for anything like the P65+ there is nothing worth the bother of stitching for - just a few mms either side, thats all.

if you want to stitch 2+ times, to cover anything like the old 6x9cm format, then it must be the Digaron-W or the apo-sironar-digital range.

[asf]

huh? maybe you are not understanding this: the Digaron S range have a TINY image circle that is specifically designed to cover a single digital sensor area.
The image circle is NOT big enough for stitching, on any modern sensor there is almost nothing spare to stitch meaningfully with.

Rodenstock say precisely this in their brochure.

the only exception is if you are using some old generation much smaller than 645 sensor. then you might get 1.5 sensor fields out of it, but for modern sensors, and certainly for anything like the P65+ there is nothing worth the bother of stitching for - just a few mms either side, thats all.

if you want to stitch 2+ times, to cover anything like the old 6x9cm format, then it must be the Digaron-W or the apo-sironar-digital range.

Oh I understand well enough, I'm asking what your experience was when you tried to stitch, not what the brochure says.

The OP states he is using a 34mp Leaf back (36x48). I have often been able to stitch with the 60 digaron s using the same Leaf back shooting architectural subjects. I don't remember a time when the IC of that lens limited what I wanted to shoot.

Your experience seems to differ from mine and I was interested as to why.

I wouldn't try to use that lens to make a 58x84 stitch using a 65p+ or any other back.

[chiek]

I'm use sinaron HR 60mm, same as digaron HR 60.

according to rodenstock spec, HR60mm has 70mm image circle.

but my experience, 60 HR with about F11, It have more than 70mm IC. about 80mm???

hope this helps.

[paratom]

I'm use sinaron HR 60mm, same as digaron HR 60.

according to rodenstock spec, HR60mm has 70mm image circle.

but my experience, 60 HR with about F11, It have more than 70mm IC. about 80mm???

hope this helps.

I use it on the Sinar Artec and Sinar does say it has a 80mm image circle.

[narikin]

I wouldn't try to use that lens to make a 58x84 stitch using a 65p+ or any other back.

exactly. I'm using a P65+ so stitching with the 60mm is almost pointless.

[asf]

I use it on the Sinar Artec and Sinar does say it has a 80mm image circle.

Why do you think then your experience, Chiek's and mine differ from the other user's? Does his lens have a defect?

[asf]

exactly. I'm using a P65+ so stitching with the 60mm is almost pointless.

The OP asked about stitching with a 36x48 back, not making a 6x9 stitch with a phase65+.
Have you used this specific lens or are you only going by what you've seen in a brochure?