P3200 in moonlight

Many years ago, I did some moonlight photography, on scenes lit by a full moon (and away from city lights).

 

If I remember it, I did some with Ektachrome 200, f/2 for about 10 minutes, or maybe 15 minutes.

 

With P3200 at EI 25000, it would be much shorter. (The ED times include some increase

due to reciprocity failure, which might be less significant for TMZ at 25000, or maybe not.)

Interestingly enough, Kodak doesn't give any exposure correction. I'm a bit surprised-it may be that they just don't expect anyone to use a long enough shutter speed to actually need it, or maybe it really IS that good.

 

The large format guys are mourning the fact that Acros sheet film is being discontinued since its reciprocity characteristics are legendary. Of course, with no MF even committed yet, sheet film is a LONG way off. At the same though, Kodak will sell you film in about any format you want provided that you commit to a master roll-the only quirk might be whether or not they've worked out coating it on Estar.

 

Let's see the results!

1/10,000???

 

hahaha usually reciprocity correction is for exposures over a minute or an hour. is that the entire chart?

1/10,000???

 

hahaha usually reciprocity correction is for exposures over a minute or an hour. is that the entire chart?

 

That is the complete chart.

 

Many films do also require correction for extremely short shutter speeds-we just never run into them in normal photography. I don't routinely use anything faster than 1/2000, and rarely have I used 1/4000. I THINK the F4 and F5 will go to 1/8000, but I've never gone that fast.

 

The only reason I can think of for such a shutter speed is if you were using a fast film outdoors and wanted to use a large aperture. Even then, you're still up a creek if you're using ASA 400 film since you're still in the f/4 range at 1/8000 in full sun. If you need to stop action, I question the value of speeds that fast since you're going to get some "scanning" effects from the shutter.

The extremely short times would apply to electronic flash which might have a duration of 1/50,000 second. I remember Kodak recommended extra exposure when using Tri-X and Plus-X with strobe.

The extremely short times would apply to electronic flash which might have a duration of 1/50,000 second. I remember Kodak recommended extra exposure when using Tri-X and Plus-X with strobe.

 

That COULD be the case, but it would also depend somewhat on the flash design.

 

My big Normans run between 1/500 and 1/1000 depending on where the power output is set. Many on-camera flashes warn of sync speeds faster than 1/500(some DSLRs are able to do it by "pulsing" the sensor-I used a D1 to measure the duration of my Normans that way) due to the potential for loss of flash output.

Mainly thinking about the traditional auto flashes (like Sunpak 511 for example). Some later flashes did get around this limitation. I found with my Sunpak and Vivitar flashes that I usually needed to open up a half a stop in close up range with Tri-X and Plus-X.

Note that reciprocity failure isn't only for film, but also paper.

 

Modern digital printers scan the paper with modulated lasers, for microsecond exposure at each spot. Yet the papers are still designed to allow traditional enlarger printing, too.

Yes, Tri-X: http://imaging.kodakalaris.com/sites/prod/files/files/products/f4017_TriX.pdf

 

has corrections, both in exposure and development, for short and long times.

"With P3200 at EI 25000, it would be much shorter."

 

- And also very underexposed!

P3200 has a real ISO speed of about 1600. No amount of setting silly numbers on camera or exposure meter will change that. And no amount of developer juggling will make it any faster either.

 

Exposing at EI 3200 gives acceptable - but exceedingly grainy - results. The loss of shadow detail is minimal.

 

An EI of 25000 would underexpose by at least 4 stops; leaving only fairly strong highlights developable.

well lets see the pix guys?

 

im still waiting for the fat lady to sing.

well lets see the pix guys?

 

im still waiting for the fat lady to sing.

lol. The fat lady is busy studying the details of acoustical science (and eating cheeseburgers) and doesn’t have time for a song right now. :)

Fed Ex is lost......

well lets see the pix guys?

 

im still waiting for the fat lady to sing.

 

I finished up a roll at work today-I walked around with the 45mm 2.8 GN on my F2 and was shooting at 1/125 and f/5.6 or f/8. The DOF available was a nice change from using f/1.4 or f/2 with Tri-X.

 

I probably won't be able to develop it until this weekend. In the mean time, I might try some old stuff from the freezer.

 

BTW, I loaded this roll in a beat to heck black F2 Photomic. I have a bunch of F2s, and in the past have described this particular camera as my favorite F2. I honestly haven't used any of my Photomics much since getting a few F2As and an F2AS. All of my F2s seem to have their own personality, and I can't put my finger on it but using this camera reminded me of just how much I like it. I can't put my finger on it-it's probably my most heavily used F2(even though I can only claim a tiny fraction of the wear) but it just feels "right."

thats why it was so popular... its a well built machine.

While I'm waiting for the time to develop it, we'll give this a shot...

 

For those following this, the second full moon for March, on the 31st, will be at 1237 GMT, or 8:37 AM EDT,

 

Good chance for clouds in Seattle, though, so I might not try this until summer.

I was just wondering about that. Finally caught up with that FedEx truck.....

Time to load the F3.....

crank m up!