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| Pulling Arista EDU100 | |
| Author | Message |
|---|---|
| ktm_2000 Joined: 19 Jun 2019 Posts: 75 |  Posted: Tue Apr 27, 2021 5:29 pm Post subject: Pulling Arista EDU100Hi All, I've been enjoying my speed graflex and aero ektar combination but have been running into issues with too much light for f2.5 even with the 1/1000th shutter speed as my meter is telling me 1/4000+ on a sunny day. I've tried pulling a roll of tmax400 but haven't tried with Arista EDU. How many stops do you think I could get away with? if I tried pulling? |
| 45PSS Joined: 28 Sep 2001 Posts: 4081 | Posted: Tue Apr 27, 2021 7:18 pm https://www.digitaltruth.com/devchart.php?Film=Arista+EDU%25&Developer=&mdc=Search&TempUnits=F&TimeUnits=D It will depend on the developer you're using. Are you sure your shutter is running at its marked speed? A neutral density filter may be needed. |
| ktm_2000 Joined: 19 Jun 2019 Posts: 75 | Posted: Tue Apr 27, 2021 9:12 pm I have no good way of telling that the shutter speed is off, it has purely been the case where I've chosen to not take shots due to conditions. this shot here was 1/500th and came out fine (excluding my development issue I figured out on another thread) https://photos.app.goo.gl/GR4DhTGxicdpt6bx8 I have a NISI 100x100mm holder along with a couple ND filters but haven't tried to get a ring on the front of the aero ektar. I'll see if I have a ring which would work. I was thinking in a perfect world pulling 2 stops I could cheat near 1/4000s. We are heading to Acadia National park for a long weekend, I'll shoot a developing batch of 3 holders 2 stops over as a test. |
| 45PSS Joined: 28 Sep 2001 Posts: 4081 | Posted: Tue Apr 27, 2021 10:06 pm https://silvergrainclassics.com/en/2020/06/introducing-the-photoplug-easy-shutter-speed-testing-for-your-smartphone/ After testing several FPS on 4x5 Speed Graphics I found that a sensor at the center of the film plane will read the speed accurately. I had a homemade tester using infrared led that required a powered mic jack on the computer to work. I recently built one using a battery holder and 4K ohm resistor from ebay and a SHF 310 photo transistor from Mouser.com. I can email you the diagram I used as its no longer on the net. The tester uses https://www.audacityteam.org/ recording program. The accuracy is based on the photo transistor/diode 's rise/fall time which is 8 microseconds. |
| keshlam Joined: 21 May 2021 Posts: 38 | Posted: Wed Jul 28, 2021 3:34 am ... using Audacity as a poor man's memory oscilloscope. Nice solution! |
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