Archived posting to the Leica Users Group, 2008/02/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]4x5 IR is on par with other 4x5 products, for the most part. 2?, on
the other hand, I'm not tempted to try. While friends have used the
4x5 IR commercially, I was never tempted. I did use 35mm for a short
time, as a portrait media, until I reached a plateau due to the
material's limitations.
I cooked mine at around 90? to 100?, just short of making the
emulsion peel. Around there, lens resolution and Lp/mm become moot.
s.d.
On Feb 1, 2008, at 5:43 PM, Henning Wulff wrote:
At 3:39 PM -0800 2/1/08, slobodan dimitrov wrote:
> Rollei claims 160 Lp/mm, I believe this is a Maco product, which I
> find hard to believe.
> What do you make of the resolution found in the following images:
> http://www.smcqueen.com/Maco/
> s.d.
>
> On Feb 1, 2008, at 12:35 PM, Henning Wulff wrote:
>
> At 11:26 AM -0800 2/1/08, slobodan dimitrov wrote:
>> I tried 3 lenses on an M4. All produced the hot spot.
>> But that was over 30 years ago. Now, I'll stick with a metal
>> shutter.
>> On the other hand, resolution is so low with IR, that any lens
>> will do.
>> s.d.
>>
I haven't actually used the Rollei product myself, only seen results
from a friend. I have my doubts about that resolution claim as well,
but then the only way I really check such things is within a whole
system. I put my highest resolution lens on a camera, at the optimum
aperture, the whole thing on a tripod, etc. Because it's such a
boring thing to do, I hardly ever do it.
Then you have to use the best developer and be able to see resolution
targests through a loupe. Very thin negs with high contrast
development. Optimal resolution for the system, but not interesting
for actually taking pictures, because you never take pictures and
develop them that way.
If you can get real 50 lp/mm, you're doing really well, and you'll
have very 'sharp' pictures.
The resolution in those images you referenced looks more like 5 lp/
mm, but then thaqt might just be the scans/web images. Hard to tell.
820c can do a lot better.
The Maco 820c is definitely a lot higher resolving than HIE, but it's
also bog slow and doesn't have the glow. The HIE at least can be shot
handheld with an 87 filter, which is a great combination.
--
* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:henningw@archiphoto.com
|[ ]| http://www.archiphoto.com
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