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10-26-2013, 08:14 PM   #1
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Supep-Takumar/6x7 1:3.5 55mm for long exp Halloween photos

(Not a typo, this lens is a "Supep" )
We get crowds of costumed visitors in the street, so far over a few years I have just done flash on the Pentax ist-ds and Pentax MX which has been OK.
Some visitors carry lights and often they have bright white costumes.

This year I want to try to learn a bit about long exposure shots with moving people, using the 6x7 55mm on a tripod at some distance.
I measured the ambient light last evening, it will be 5 ~ 1EV which is down to 8 to 12 secs at iso 100 f/5.6.

I have Ektar 100, Fuji 160 and Fuji 400.

The lens is on a Speed with focal plane shutter , so I get 8 shots, and I will have to use T mode with a stopwatch.
I think the general focus distance will be about 8 to 10 metre ( 24 foot)
Some ability to fire an AF360 slave flash on a stumpy tripod close in.

Any advice will be appreciated - which film iso is easiest for the first try ?

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10-30-2013, 03:54 PM   #2
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In case anybody (...maybe nobody.. ??) is doing this with old Pentax film gear.
I did some "day before" measurements with a vintage Honeywell Pentax 3/21 Exposure meter (Cadmium Sulphide LDR).
and a Pentax MX which is (Gallium Photodiode, centre weighted) ,on a SMC Pentax Zoom 1:2.8 40~80mm
The Spotmeter was aimed at brightest light in each case, whereas the Pentax MX is centre-weighted, and exposes at a lower, more average light level.
Oct 30 5:45 pm
Sky Spotmeter EV 13

Grass Spotmeter EV 6.5 predicts f/4 1/45 sec @iso 800
Grass MX f/4 1/8 sec @iso 800

House opposite Spotmeter EV 8.0 predicts f/5.6 1/60 sec
House opposite MX f/5.6 1/8 sec

Pumpkin front door Spotmeter EV 5.5 predicts f/4 1/30 sec
Pumpkin front door MX f/4 1/8 sec

By 6:43 the Spotmeter says the sky is EV 4 and does not give any meter movement for setting the camera.
10-30-2013, 05:05 PM   #3
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The SMC Pentax 1:2.8 24mm on the Pentax K-01. Lit by the dining room chandelier which now has 5 of small cfl
(The kids used the scoop but were not allowed to use the carving knife)
iso 800 , f/9, 0.3 seconds.
How can I expose such photos on the Takumar/6x7 1:3.5 55mm ??
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10-31-2013, 07:20 AM   #4
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QuoteOriginally posted by wombat2go Quote
The SMC Pentax 1:2.8 24mm on the Pentax K-01. Lit by the dining room chandelier which now has 5 of small cfl
(The kids used the scoop but were not allowed to use the carving knife)
iso 800 , f/9, 0.3 seconds.
How can I expose such photos on the Takumar/6x7 1:3.5 55mm ??
You have "f9.0... would you have gone for f5.6? The lens... 6X7 Takumar 3.5/55mm is a max widest of f3.5 and if I get your question... the setting is just two stops wider with the 400 film or you could spring for the Portra 800 and do the same of f9 and 0.3 seconds.... or a if you consider that the 55mm is going to be a slight shallower depth of field and then you might have to go f11 for get a little more hyperfocal flavor in. Maybe brighen up the room with a ceiling bounce of the flash with a white sheet of paper in front of the flash and still keep the f9 and go down to iso 400 film? Otherwise, I guess I missed what the question is here?

10-31-2013, 09:42 AM   #5
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QuoteOriginally posted by wombat2go Quote

Grass Spotmeter EV 6.5 predicts f/4 1/45 sec @iso 800
Grass MX f/4 1/8 sec @iso 800

House opposite Spotmeter EV 8.0 predicts f/5.6 1/60 sec
House opposite MX f/5.6 1/8 sec

Pumpkin front door Spotmeter EV 5.5 predicts f/4 1/30 sec
Pumpkin front door MX f/4 1/8 sec
Is this a one-degree spot meter? I'm not sure how you are using it. If you derive an exposure from looking one EV value from a spot meter and using that value for the exposure with no other adjustments, it is placing that value at zone V, the middle gray exposure.

So lets say you aimed it at a white shirt a person might be wearing and got a EV reading. You need to decide how "white" you want that shirt to be by placing it X-number of stops above your middle gray exposure. Similarly with a dark area. If you decide this dark area is about the darkest you want detail, you would measure it and then place that, say, 2 or 3 stops below your middle gray exposure.
10-31-2013, 10:06 AM   #6
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QuoteOriginally posted by wombat2go Quote
How can I expose such photos on the Takumar/6x7 1:3.5 55mm ??
Using this lens on which camera. The K-01 or the Pentax 6x7?
10-31-2013, 10:43 AM   #7
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Thanks for the comments, Tuco and Mystery
At indoor party I recently used the Tak 6 x 7 90 ls with the AF360fgz flash plugged in, in bounce mode on Ektar 100 , I have not processed the rolls yet.
I thought it would be fun to take some long time exposures with the wide angle Tak 6 x 7 55mm on a tripod in the corner of the room.

The Tak 6 x7 55mm is on the Speed Graphic with the RH/8 back for 120 film and I also wanted to take some outdoor low light long exposure with a stopwatch with the FP shutter in T mode, but I have no experience or basis for the exposure times.

I wanted to keep the lens stopped down at least f/8 for DOF both indoors and outdoors.
There are no timed speeds below 1/30 th on the shutter, after that it is T mode.

I should just run 8 shots at various times to learn a bit about it.
I suppose there is no downside to using slow film like 100 iso Ektar.

Anyway it is raining here and predicted rain tonight so our Halloween might be limited, anyway I won't take the Graflex out if it is raining..

The light is below EV 1 so the spot meter is of no use
This old Spot meter is a 3/21 degree.
I tested it on a color chart, skin tone. When the K-01 was set to its prediction, the skin tone brightness was 180 out of 255
I have a newer 1/21 Pentax V to repair and recalibrate, but its lower limit is also EV 1.
10-31-2013, 10:53 AM   #8
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If you're going to bounce flash and use a film camera, just trial and error on your digital camera until it records a decent exposure and then translate an equivalent exposure to your film camera. Close enough. Negative film has a lot of latitude.

10-31-2013, 11:07 AM   #9
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Thanks Tuco,

A problem I have is with batch processing the rolls of 120.

By the time I have accumulated enough ( 8 ~ 10) to set up the C41 devel, I have long forgotten how my weird and (not so) wonderful shots were taken !

I do keep a note book, but draw the line at making notes shot by shot.
10-31-2013, 11:32 AM   #10
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QuoteOriginally posted by wombat2go Quote
...
By the time I have accumulated enough ( 8 ~ 10) to set up the C41 devel, I have long forgotten how my weird and (not so) wonderful shots were taken
I know that feeling. I don't shoot color film too often and I have one roll I took this summer and I'm still waiting to take at least another roll before I mix up the chems and develop them.
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