Because I have shot so many different formats I decided the Cokin filters were the best way to go. Just buy the different adapter rings and you can you the same filters on any lens. The Cokin 89B is what I use too.
Because I have shot so many different formats I decided the Cokin filters were the best way to go. Just buy the different adapter rings and you can you the same filters on any lens. The Cokin 89B is what I use too.
I have a lee 100x100 (4inx4in) kit including a bellows. Do you have to worry about stray light getting behind the filter? I would prefer to go this route so I can use various lenses. I haven't seen the 89b sold for Lee yet, I guess I will have to look harder. Thanks!
I have never had a problem. The 89b fits tightly in the holder.
Cokin doesn't call it an 89b, it's a 007.
That's what I use, and I've never had problems with light behind the filter. I have the wide angle hood with 2 slots, and I use the slot nearest the lens. The Lee IR filter comes as just a plain piece of polyester, so you have to buy the mount, cut it and fit it to the holder (which is a bother, I'd pay more for it to be pre-loaded)
Filter: http://www.leefiltersusa.com/camera/...4757E77C05DCB/
Mounts (10/pack): http://www.leefiltersusa.com/camera/...47BE96B4E501C/
The gel-snap works with the IR filter too, but you have to be more careful about making sure you cover the lens completely. I've had light leaks with the snap holder:
http://www.leefiltersusa.com/camera/...475679C8606E3/
Drew
https://www.flickr.com/photos/drew_saunders/
John, who is the seller on ebay? By the way, I always use an opaque filter (kodak 87) and EI 1.5.
YouTube Channel: https://www.youtube.com/user/andy8x10
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This is the person and listing I bought from.
http://www.ebay.com/itm/110761786780...9#ht_500wt_922
I haven't used any of the film so I can't vouch for it.
Thanks John. I snagged a box. Too good to pass up.
YouTube Channel: https://www.youtube.com/user/andy8x10
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I've just finished testing my batch of Efke IR820 8x10 format sheet film that I got from Ebay last year. My film 'fridge runs at 4 Celcius and the film has been in there about 6 months. The film may be showing its age with the sensitising dye for infrared response degrading and the overall sensitivity diminishing. Here are some results:
Exposed as a normal panchromatic film, no filter: effective EI = 8.
Exposed behind a #25 red filter: effective EI = 1
Exposed behind a IR680 or IR720 filter: effective EI = 0.15
Development was 11 minutes@ 20 Celcius in Xtol.
The negatives show no overall fog but contrast is low. Perhaps this is consistent with an aging emulsion. Contrast boosting experiments continue.
In spite of the lower than expected sensitivities I'm going to shoot this intriguing and inexpensive film ($75 a box of 50) and see what wonders will emerge.
Curiously, the Efke IR820 emulsion on my 120 format and 4x5 format films seems good and delivers a consistent EI = 1.5 (behind IR680 and IR720 filters) and these films have been in my 'fridge for more than a year.
Photography:first utterance. Sir John Herschel, 14 March 1839 at the Royal Society. "...Photography or the application of the Chemical rays of light to the purpose of pictorial representation,..".
Maris,
I have been shooting relabeled EFKE (MACO) for years now, I keep my film stock at -20degC, and a box "ready to (almost) go" at 4deg C, as well as a couple of loaded holders at room temperature. Haven't seen a loss of contrast (and it has heaps of it) nor increase of fog, my oldest batch must be more than 5 years old
I too end up at 1-1.5 Asa with a 70 red filter.
Best,
Cor
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