Macophot IR exposure

[craig_h1]

I'm trying IR for the 1st time. In Laurie White's book, she suggests

F11 1/125 sec for the 1st roll with Kodak film suggesting ASA 50 with

a #25 filter. What exposure should I use with Macophot IR 820c film

& what should I use as a suggested ASA? Thank you.

[dean_tomasula1]

Craig, with a 25 filter try a starting ISO of either 21 or 24. Exposure depends on conditions. You can always use the Sunny f/16 Rule (f/16 @ 1/30 sec. providing its nice and sunny). With an R72 filter I'd use an ASA of 12 to start.

 

Processing times are anywhere between 8 minutes and 13 minutes in D-76. It depends on whom you ask which time you'll get.

 

Here's a PDF from Maco with some suggested developing times and other info.

 

http://www.frugalphotographer.com/Publications/IR820c.pdf

 

Good Luck.

[ronald_moravec1]

I use 1/60 at 5.6 with the 092 B+w filter on 820 film.

 

I see no point in using a plain red. I want white foliage and dark sky.

 

Set the camera meter to 200, 800 with Kodak HIE, and meter right thru the filter to an area you want middle grey.

 

http://www.a1.nl/phomepag/markerink/mainpage.htm Lots of good info here Copy and paste URL.

 

More here http://www.cocam.co.uk/CoCamWS/Infrared/INFRARED.HTM

 

 

It is not 200 ASA, but the cells are not designed for IR either. This has worked for me with every camera and hand meter I ever tried, Cds and Silicone cell. There are no other cells made.

 

I expose Kodak at 1/250 and 5.6 and no longer meter or bracket under full sun, blue sky conditions. I only meter shade using 800 right thru the filter. It is easy with a rangefinder, but you can do the same with an slr and tripod.

 

I`m going to try to attach some ir pics, but they are probably stored on a differnt user so I can not attach. I`ll do another response or send them to your E-mail. Please check

 

http://www.cocam.co.uk/CoCamWS/Infrared/INFRARED.HTM

 

http://www.a1.nl/phomepag/markerink/mainpage.htm

 

http://home.wxs.nl/~losjb/hometest.html

 

Copy and paste these url`s into the address bar.

[ronald_moravec1]

I`ll add a few<div></div>

[ronald_moravec1]

One more<div></div>

[ronald_moravec1]

i am just too tired to photosop these to a smaller size.<div></div>

[kevin_hundsnurscher]

For Maco with a red 25 filter, you can actually just put the filter on and meter according to what the camera indicates.

Normally, I use a Wratten 87 filter and keep the ISO set to 100 but set the shutter speed to 1/2 and an f-stop of 5.6 to make sure I get a good amount of focus.<br><br>

Here's an example of Maco 820 Aura (Same as 820c but without the anti-halation layer):<br>

<img src="http://elaisted.com/ljprev/beach-IR-maco.jpg">

[bruce_karnopp1]

There is another way to get an exposure right with KODAK HIE or MACO 820c. David Romano has modified a Konica-Minolta meter so that it will give accurate exposures based on the IR part of the spectrum. Most meters will not read the non-visable IR spectrum, so this meter is very useful.

 

Check the web-site below for a good deal of information about IR photography as well as the meter I described. David also has cut down 70mm film so it can be used as 120 film. Unfortunately, Kodak has discontinued this film. So MACO 820c is the only option besides Konica 750. But the MACO film does come in many formats including sheet film.

 

Also MACO is about to put out an IR film 2 stops faster that the current 820c film.

 

One hopeful sign as very large manufacturers jump ship from film is that smaller firms are filling the gap. It makes sense since there are so many fine cameras made from 1940 on that are more than serviceable.

I have a great Kodak Medalist from 1944, and a Super Graphic probably from the 1970s. Both are a joy to use.

 

http://www.davidromano.com/

[russ_butner___portland__or]

I haven't tried the Maco version yet. For Kodak HEI, I set my meter @ 400 and meter and focus through a deep red #29 filter.

 

Russ<div></div>

[scott_whitford]

With B&W 092 filter, expose at EI 3 in full sun. I develop in Pyrocat HD 1+1+100 for 7 minutes at 75 deg F. (developed in Jobo tank with hand inversions - 10 sec agitation per minute)

 

Full Wood effect, good shadow detail, and very fine grain (for an IR film)

 

Scott