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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6136242 - 10/14/13 02:47 AM Attachment (30 downloads)

Another one. Giorgo big guns for our safari. Rolls of Fuji Acros ordered..

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Chuck Hards
Post Laureate
*****

Reged: 05/03/10

Loc: The Great Basin
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6190175 - 11/12/13 08:53 AM

A fellow in our club has a 5" model for sale, if interested, PM me and I'll put you in touch with him.

Disclaimer: I have no personal interest in the matter.


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galaxy_jason
Vendor


Reged: 05/22/07

Loc: Texas
Re: Celestron Schmidt cameras new [Re: Chuck Hards]
      #6202869 - 11/19/13 12:15 AM Attachment (26 downloads)

Interesting to see people still using Schmidt Cameras. I toy with selling, converting to ccd or just leaving mine as is. I still have plenty of tech pan in the freezer.

Any thoughts on 120 color film for ISON. Red sensitive
film seems to be hard to find but for a comet that's not
really needed.

Here is my camera....


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TxStars
Pooh-Bah
*****

Reged: 10/01/05

Loc: Lost In Space
Re: Celestron Schmidt cameras new [Re: galaxy_jason]
      #6203149 - 11/19/13 08:12 AM

I was thinking of using Ektar 100 since I have it in the freezer.

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Michal1
sage


Reged: 07/25/10

Loc: Czech Republic, Central Europe
Re: Celestron Schmidt cameras new [Re: TxStars]
      #6203805 - 11/19/13 01:45 PM

Fuji Provia 400F will be my choice - fast, blue/green sensitive and I have it.

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Nightfly
Pooh-Bah


Reged: 06/20/07

Re: Celestron Schmidt cameras new [Re: Michal1]
      #6204537 - 11/19/13 08:13 PM

Jason, Any luck finding some Fujicolor Superia 100 in 120?

An alternative choice for color would probably be Ektar 100 in fast systems.

For B&W, Acros would do fine.


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galaxy_jason
Vendor


Reged: 05/22/07

Loc: Texas
Re: Celestron Schmidt cameras new [Re: Nightfly]
      #6205951 - 11/20/13 03:34 PM

I have plenty of tech pan, may just shoot the comet with that. Of course nothing cuts through the clouds we have had and the moon is interfering now. Hopefully we get a good show after it's close encounter with the sun.

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galaxy_jason
Vendor


Reged: 05/22/07

Loc: Texas
Re: Celestron Schmidt cameras new [Re: galaxy_jason]
      #6205985 - 11/20/13 03:58 PM

I would also be careful about seeking out older films. Just because it has been in the freezer doesn't mean it it still good. I have some PPF 400 that has been in the freezer and it is dead as a door knob. These films use organic dyes for color that break down. Tech Pan on the other hand is silver. It lasts for years

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Nightfly
Pooh-Bah


Reged: 06/20/07

Re: Celestron Schmidt cameras new [Re: galaxy_jason]
      #6206227 - 11/20/13 06:29 PM

Yea, I got some E100S that is 10 years old frozen but has lost some oomph. Even the Provia 400F I got second hand was lacking even a few years out of date. My E200 and Superia are still great as they are only a few years out of date and I have handled them since new. I do plan on using them all within the next few years to gain the most of their limited shelf life.

Shoot 'em if you got 'em....


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galaxy_jason
Vendor


Reged: 05/22/07

Loc: Texas
Re: Celestron Schmidt cameras new [Re: Nightfly]
      #6209863 - 11/22/13 04:52 PM

Leaning towards Portra 400 for the comet. Its blind in the red but compared to the old standby PPF it may actually be be better in the blue.

Here is a comparison I did from a PPF shot many years ago to a Portra shot from two years ago. Both were around 4 minutes at f2.2

http://galaxyphoto.com/temp/pro_comp.jpg

Thoughts?


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Nightfly
Pooh-Bah


Reged: 06/20/07

Re: Celestron Schmidt cameras new [Re: galaxy_jason]
      #6210214 - 11/22/13 08:42 PM

My initial tests of the new Portra 400 indicated pale colors, especially reds in long exposure. Perhaps the luxury of fast systems cope with this problem better as your test image does show weaker colors, but tolerable perhaps in post processing. Overall recording power seems to be good with limiting magnitude every bit as good as legacy films.

I also tested Portra 160. It recorded well, was strong in the blue, but weaker in the reds (surprise surprise), where Portra 400 had a strong cyan response. So perhaps the 400 is the better film here for comets.

I do want to mention Ektar 100 as it did the better job in the red spectrum vs. both Portra's. You'll have to play around with the strong cyan response here as well.

30 minutes 105mm f/3.3:

http://www.flickr.com/photos/12598495@N08/3829654187/


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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: galaxy_jason]
      #6231025 - 12/03/13 09:38 AM

Hi Jason,
I consider my self fortunate enough because via the Schmidt Camera post I can communicate with legendery persons.
can you estimate the weight of the Meade Schmidt camera OTA (without guide scope, pier, mount)?. I know that the complete system has total weight of 300 Kgr (around 600 lb).
I am just curious.

Kind Regards

Dimitris

Edited by mitsos68 (12/03/13 09:43 AM)


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galaxy_jason
Vendor


Reged: 05/22/07

Loc: Texas
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6233105 - 12/04/13 11:34 AM

Hey Dimitris,
It was never published and we never weighed it but I would
guess around 125 lbs for the tube alone. That is without the
dec assembly. Its based on the 16" LX200 OTA. It may be a bit less.


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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: galaxy_jason]
      #6234601 - 12/05/13 02:15 AM

Thanks Jason!. Hope to keep it as is. Good films still exist.
Kind Regards
Dimitris Barounis


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galaxy_jason
Vendor


Reged: 05/22/07

Loc: Texas
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6235421 - 12/05/13 01:32 PM

Someday this will be afordable enough to put in the big SC..
http://www.truesenseimaging.com/technologies/truesense-6-0-micron-full-frame-...


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