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New B&W film for astro work

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#1 TxStars

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Posted 25 January 2019 - 03:14 PM

I just got some info today about a fairly new B&W film that should work decent for astro work.

 

The down side is that at ISO 400 it may show some grain.

 

https://www.japancam...etpan-400-film/

 

I will have to get a roll or two and try it out.



#2 Xeroid

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Posted 25 January 2019 - 04:23 PM

We use to reduce the ISO rating then cut back a bit on development time.



#3 photoracer18

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Posted 25 January 2019 - 04:33 PM

I don't think anything was as grainless as the old Tech Pan 2415 (ASA 25). I used Plus-X and Tri-X as a teenager in the Mid-60's  because my dad knew how to develop film and brought a Leica enlarger back from the war along with his Leica camera. Later on I used 103ae astro film a few times but was in the service during the early days of gas hyperizing of film so never did that. Thing I hated most in those days was guiding with an eyepiece myself.


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#4 TxStars

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Posted 25 January 2019 - 05:29 PM

I still have around 200ft of 2415 & about 75ft of 6415 in the freezer, but that supply is running low.

 

I try and test any new films I find in hopes of finding something great, but so far most are just ok or decent..



#5 Todd N

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Posted 25 January 2019 - 11:05 PM

I just got some info today about a fairly new B&W film that should work decent for astro work.

 

The down side is that at ISO 400 it may show some grain.

 

https://www.japancam...etpan-400-film/

 

I will have to get a roll or two and try it out.

 

I had done some initial testing on this film some time ago and I've come to believe it is the same as Rollei Retro 400S, both being the same rebranded aerial film. My earlier test with JCH showed some initial promise to red sensitivity and reciprocity test with H2 hypering but I think my light source was too bright and  I have come up with a more standardize testing procedure and the Retro 400 hasn't shown good results: Huge reciprocity and insignificant benefit with hypering. I'm going to try one more test with a much longer hypering time but I don't expect much.

 

The film that has the best red response and benefit from hypering that I have tried so far is Fomapan 400. But, it has huge grain. I have posted the results here before.

 

 

Todd


Edited by Todd N, 25 January 2019 - 11:36 PM.

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#6 Michael Covington

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Posted 26 January 2019 - 12:39 AM

I just got some info today about a fairly new B&W film that should work decent for astro work.

 

The down side is that at ISO 400 it may show some grain.

 

https://www.japancam...etpan-400-film/

 

I will have to get a roll or two and try it out.

I see it is panchromatic with extended red sensitivity.  Should be much better than Tri-X for long exposures of nebulae.  My recollection is that Ilford HP5 extends farther into the red than Tri-X, though not all that far.



#7 TxStars

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Posted 26 January 2019 - 08:25 PM

I had done some initial testing on this film some time ago and I've come to believe it is the same as Rollei Retro 400S, both being the same rebranded aerial film. My earlier test with JCH showed some initial promise to red sensitivity and reciprocity test with H2 hypering but I think my light source was too bright and  I have come up with a more standardize testing procedure and the Retro 400 hasn't shown good results: Huge reciprocity and insignificant benefit with hypering. I'm going to try one more test with a much longer hypering time but I don't expect much.

 

The film that has the best red response and benefit from hypering that I have tried so far is Fomapan 400. But, it has huge grain. I have posted the results here before.

 

 

Todd

If you could repost them it would be great..For some reason my browser cant locate the page.



#8 Todd N

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Posted 26 January 2019 - 08:59 PM

If you could repost them it would be great..For some reason my browser cant locate the page.

Llink to the original CN post for Fomapan 400:

https://www.cloudyni...hypering-tests/

 

Comparison tests of light scource between various hypered and unhypered Fomapan 400:

https://www.flickr.c...eposted-public/

 

Earlier Orion Nebula test comparison:

https://www.flickr.c...eposted-public/

 

Some more recent hypered images:

M42 single 20min: https://www.flickr.c...eposted-public/

 

M42 10min. exp. C8 @f/10 with W92 filter:

https://www.flickr.c...eposted-public/

 

As you can see, really grainy. I used HC-110 dil B and I intend to try a finer grain developer. Underdeveloping doesn't help. I pulled development to ISO240 and was just as grainy.  I've tested many other films but this Fomapan 400 has the best hypered results out of anything else I tried. Bergger Pancro 400 has good but lesser performance than Fomapan(H-alpha) and better broad spectrum response but it looks like it has been dicontinued in 35mm.



#9 Rotciv.greene

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Posted 21 February 2019 - 07:17 PM

If you guys are looking for something more red and IR sensitive, I would give this a shot. 

https://filmphotogra...ck-and-white-ir

Here is a terrestrial photo I took with just a regular red filter in front of the glass. 

Attached Thumbnails

  • E2C78F97-2BC2-4D54-A743-BFC2F1063B3B.jpeg

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#10 Rotciv.greene

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Posted 21 February 2019 - 07:19 PM

And another.

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#11 drmarvh44

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Posted 28 April 2019 - 05:27 PM

If you guys are looking for something more red and IR sensitive, I would give this a shot.
https://filmphotogra...ck-and-white-ir
Here is a terrestrial photo I took with just a regular red filter in front of the glass.



#12 drmarvh44

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Posted 28 April 2019 - 05:29 PM

Fine terrestrials! Have you tried this film with astrophotography objects? Love to see some examples of that!

Wish it were in 120.

#13 Nightfly

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Posted 01 May 2019 - 05:28 PM

Fine terrestrials! Have you tried this film with astrophotography objects? Love to see some examples of that!

Wish it were in 120.

https://www.japancam...etpan-120-film/


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