How Would You Compare Velvia 50 to Ektachrome 100 ?

[miha]

@Photomultiplier,

Thanks for bringing Alex Burke's page to our attention, It's well worth visiting. The thing that rang the bell for me is that he isn't using the standard E6 / CR56 process but the simplified 3-bath Tetenal process. Not to stir this thread up again I'll leave it here.

 

[Sirius Glass]

Can they actually correct a LF shutter that's off 1/3 stop? And varies a little at different shutter settings?

Ask Carol at http://flutotscamerarepair.com/

 

[Alan Edward Klein]

Ask Carol at http://flutotscamerarepair.com/

Her web page shows that they aim to meet tolerances of 20% for shutters under 1/125 and 30% for 1/125th and over. Not much different than what I have now.

Shutter Speed Tolerances

 

[DREW WILEY]

What's more important when measuring shutter speeds is their predictability. For example, if a shutter speed is always a third a stop off a certain direction, it's easy to correct for that using a third a stop adjustment to the aperture itself. But if it's unpredictable, one time a third off, next time two thirds, etc, then you have a potential issue shooting chrome films. I have my own shutter tester. All my lenses are in relatively modern Copal shutters, and except for the very highest speeds, where Copals are generally off, all their respective typically used speeds are of tight enough tolerance for chrome work if necessary, within 1/6th of a stop.

But it helps to seek out scenes of moderate contrast to begin with, especially when shooting Velvia.

 

[RudyMerz]

A lot of things have changed. Once real slide shows were abundant; now you can't even find a lab which will mount slides.

Why can't you find a lab which mounts slides? Dwayne's, which I use since over 23 years, processes in E6 and mounts slides.

 

[Sirius Glass]

Her web page shows that they aim to meet tolerances of 20% for shutters under 1/125 and 30% for 1/125th and over. Not much different than what I have now.

Shutter Speed Tolerances

And that answers your original question.

 

[DREW WILEY]

They gave up on all the equipment, and I normally only use labs which can handle up to 8x10 C41 and E6 work too. I could of course mount em myself. It's not difficult. I probably even has some glass mounts in storage somewhere. But I rarely shoot 35 anyway. I still have my old projector, and thought it might be fun to use sometime again. There nothing quite like a real slide show.

 

[MattKing]

Why can't you find a lab which mounts slides? Dwayne's, which I use since over 23 years, processes in E6 and mounts slides.

They are one of the few who can still mount, because there are very few mounts being manufactured now.

 

[Alan Edward Klein]

And that answers your original question.

Yes. Thanks for her reference. I'll work with the lens I have the way they are. I just checked and only my Schneider 150mm is off about -1/3 stop for 1 second thru 1/30th. I should add 1/3 stop exposure on that one. My 75mm 90mm and 300mm are all pretty much on the mark at least at the lower settings I usually use.

 

[adamlugi]

With this discussion, I would like to draw attention to the developing process.


I was doing a survey recently and in my part of Europe practically no one uses control strops anymore. It is difficult to discuss the correct ISO if you do not have the process under control, especially since the slides are developed infrequently and it is difficult to determine the quality state of the chemistry.

 

[Sirius Glass]

Yes. Thanks for her reference. I'll work with the lens I have the way they are. I just checked and only my Schneider 150mm is off about -1/3 stop for 1 second thru 1/30th. I should add 1/3 stop exposure on that one. My 75mm 90mm and 300mm are all pretty much on the mark at least at the lower settings I usually use.

I never measured myself, but I would not worry about a 1/3 f/stop.

 

[czygeorge]

Hi all
I saw some discussion on EI 80 or 100

Too my opinion and experience,if you use 4-step processing(Tetenal and fuji hunt 4 steps version etc.),u need to shot at 80.If u use 7 steps(kodak e6(discontinued),cr6/56,fuji hunt 7 steps version),use 100 iso

 

[miha]

@czygeorge, interesting observation!

 

[JParker]

@Film-Niko I'm attaching a print-screen from my google email account.

And btw, I read JParker post on the ISO 80 thing......... over at rangefinder forum when he had another nick-name.

With all respect, but both is completely wrong: Neither did I post anything about E100 in 2019 publicly, nor was I ever registered and active on the rangefinderforum.

 

[JParker]

My experience with E100:

I exposed a test film where i shot each subject with 80 and 100ISO. In most cases, the 80ISO version looked better. Processing was not the culprit as i went to great lengths to achieve a very precise temperature control.........

Thank you very much for adding your test results.
And for the hint to Alex Burke and his assessment, which let him also expose E100 @EI 80.

 

[JParker]

I agree. Perhaps Fuji had already shut down the coating machine

Definitely not, as they are one of the biggest film producers with their instax and x-ray films.
No matter which manufacturer, different film types are all coated on the same big coating machine of that manufacturer.
Kodak is coating all their different film types on one coating machine,
Ilford is coating all their different film types on one coating machine,
Foma is coating all their different film types on one coating machine,
Agfa is coating all their different film types on one coating machine,
Fuji is coating all their different film types on one coating machine.

 

[brbo]

Kodak is coating all their different film types on one coating machine,

Interesting that we can see at least two running coaters at Kodak. I guess they fired up the other one just for the show...

 

[Photomultiplier]

The coating machine in B38 has two coating heads/stations but it is one machine. Each of the two heads can lay down up to 10 layers. The base first goes through Head #1 and then through #2 for additional layers.
So the two heads can not produce two different products simultaneously.

See Making Kodak Film 2nd Edition by Robert Shanebrook, page 222 and following for details

 

[DREW WILEY]

All the labs here monitor their chem activity very carefully, whether its E6, C41, or RA4. After all, E6 films are still being made clear up to 8x10, or even bigger on a custom-cut volume order basis. Goof up even one instance of something like that, and any lab would get skinned alive by the photographer. And since slides are not being frequently mounted for slide show presentations anymore, but for sake of scanning and digitally printing, often by the same labs, it would simply be shooting themselves in the foot if those 35mm and 120 chromes weren't properly processed to begin with.

 

[brbo]

The coating machine in B38 has two coating heads/stations but it is one machine. Each of the two heads can lay down up to 10 layers. The base first goes through Head #1 and then through #2 for additional layers.
So the two heads can not produce two different products simultaneously.

See Making Kodak Film 2nd Edition by Robert Shanebrook, page 222 and following for details

I'm 200 EUR short at the moment, but thanks for explanation!

 

[DF]

With all these posts/interests, I regret not throwing in Provia as well.
Should there be a new thread comparing all three,
or simply take it from here....??

 

[Helge]

With all these posts/interests, I regret not throwing in Provia as well.
Should there be a new thread comparing all three,
or simply take it from here....??

It would be interesting with a thread where people voiced in their opinions, experience, and observations about all extant slide film.
Velvia 50 and E100 was to me a bit of a random comparison as they have quite different aims.
But some interesting points was brought up here.

 

[Helge]

+1

This ISO 80 thing was widely spread on various photo forums by certain posters only soon after the re-release of the film. It has no foudation whatsoever.

Probably from people used to including the sky uncritically without thinking, and let negative films latitude pick up the slack.
There EI 80 probably works well as general compensation.

 

[DREW WILEY]

There have been multiple versions of Provia, just like multiple versions of Velvia. But if you open up yet another can of worms, expect still more anecedotal opinions with little or no objective analytic testing behind them.