Max Rez Possible: Wet Plate vs SG Vs Inkjet vs Lambda vs?

[Pere Casals]

These are my opinions:

What is the actual maximum resolution possible of image presentation at 16X20" and above?

16x20x300x300 = 28Mp

Beyond that human vision may not notice any IQ improvement.

Lambda

A lambda prints 200 or 400 pixels per inch, continuous tone.

Wet Plate is 'grainless'?

Very small grains

Color chromes have 'clouds'?

Of course. Most (or all) negative color films were modified in the digital minilab era to have larger (overlaping) clouds to decrease noise in the scans, some sharpness was lost but digital sharpening "compensated" a main share of the loss, in "pictorial" terms.

Chromes still have small clouds because are designed for projection and not for scanning.

8K monitors

7680×4320, some 32 MPix.

If we don't move the head and we move eyes to expore all image we can then beyond 64MPix we see no improvement. A TV screen probably won't fill all our field of view (at confortable situation), so a 8k should match any IQ requirement.

Silver Gelatin

Silver gelatin paper resolving power exceeds by far what human vision can see, it may record 80 lp/mm at high contrast and less at lower contrast, but anyway human eye cannot see the the silver gelatin limits. A contact copy will easily print 30lp/mm detail, but an optic enlargement has no need to go much beyond 7 lp/mm becuase the eye won't see it.

Some say that human eye perceives 30 lp/mm but paper can only deliver around 1:100 contrast, and at 1:100 contrast 7 lp/mm is the limit.

and any other possible image presentation

I love slides, to me a great presentation is coating a big glass with DIY emulsion and printing on that. To me this has the autencicity of a pure optical crafting and the capability to deliver incredible static contrast much beyond any common medium. Like enjoying underexposed slides on an overpowered light table, but magnifier-less. I'm learning that...

[Tin Can]

Now we are getting somewhere.

We all remember Microdots, but I never saw one.

From wikipedia, wet collodion was first and evidently had very fine resolution. They don't say what modern Microdots were made of.

https://en.wikipedia.org/wiki/Microdot

enSmaller X N

[Tin Can]

Pere, thank you for the summation!

I have made 14X36" X-Ray Positives by enlargement for view on a large bright light table. Masking is necessary.

The biggest I made was 4 sheets of 14X17" X-Ray which yields 28 X 34", I put it in a window for night viewing and test fade over time.

[Pere Casals]

I have made 14X36" X-Ray Positives by enlargement for view on a large bright light table. Masking is necessary.

Hmmm, this is a nice way, I'll try it.

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Here there is an study of Ruby Ambrotypes, page 18 shows x750 microscope images of the collodion on it.


http://lisaduncanllc.com/wp-content/...ambrotype1.pdf
https://web.archive.org/web/20180910...ambrotype1.pdf

[Tin Can]

Imperishable!

[Willie]

Don't know about which is the sharpest but do know of a large space booster rocket manufacturer who used an 8x10 camera for 100 to 600 time lifesize glass plate images to analyze metal stress patterns. They used an 8 foot long bellows unit by Bausch & Lomb - purpose made for the job. Polarized lighting and lens filtration to bring out what was needed. Said the plates were used as film had to much 'buckling' for the flat field needed at these magnifications. At the time they were using Kodak T-Max 100 dry plates.

So, maybe dry plate?

[Tin Can]

Bagulnik microdot

Scroll up for a tiny all in one USA made Microdot camera which also processed 8 at a time.

Wille, I spent a lot of time looking for embossed SS micro cracks with a Nikon Stereo Microscope. It printed Sony still video capture on Instant Film from about 1993.

8 hours of that gave me eyestrain I still have.