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opticsguy
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Reged: 02/02/09

Loc: Washington State
Celestron Schmidt cameras
      #6080095 - 09/14/13 10:12 AM

Is anyone using the single shot Celestron Schmidt Cameras on this forum? Or is there a dedicated forum for these cameras?

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Nebhunter
Carpal Tunnel


Reged: 10/04/03

Loc: Frostbite Falls
Re: Celestron Schmidt cameras new [Re: opticsguy]
      #6081104 - 09/14/13 09:18 PM

Yes there are. You might need to wait a bit for them to chime in. It's a rare bird these days.

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Giorgos
super member


Reged: 01/14/11

Loc: Athens, Greece
Re: Celestron Schmidt cameras new [Re: Nebhunter]
      #6081548 - 09/15/13 05:30 AM

I own the 5.5" but I haven't used it yet.

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Eric P
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Reged: 04/04/05

Re: Celestron Schmidt cameras new [Re: opticsguy]
      #6081641 - 09/15/13 07:58 AM

I'm using an 8"

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opticsguy
sage


Reged: 02/02/09

Loc: Washington State
Re: Celestron Schmidt cameras new [Re: Eric P]
      #6081875 - 09/15/13 11:14 AM

I bought my 5" many years ago with no real clear plan. Was building a house and planned for a darkroom. Life got in the way and this never happened. the schmidt camera sits in case, not collecting dust, and at this point in life not really sure what to do with it. The use of digital cameras makes me think these are kind of worthless, all my old film camers are not used anymore also really of no value. Looking for some inspiration.

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Michal1
sage


Reged: 07/25/10

Loc: Czech Republic, Central Europe
Re: Celestron Schmidt cameras new [Re: opticsguy]
      #6081983 - 09/15/13 12:28 PM

These pictures could inspire you to give a chance to your film equipment . I believe that the scanning is the factor limiting the resolution of these images. If there were more clear nights, I would consider getting a Schmidt camera.

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Eric P
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Reged: 04/04/05

Re: Celestron Schmidt cameras new [Re: opticsguy]
      #6082244 - 09/15/13 03:09 PM

If you can get to a dark site then you might want to give the old Schmidt a try. I have a film holder that does take roll film but I found it too cumbersome and fiddly to use. I prefer the cutting individual film clips which also makes home developing easier to tweak IMO.





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Eric P
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Reged: 04/04/05

Re: Celestron Schmidt cameras new [Re: Michal1]
      #6082250 - 09/15/13 03:11 PM

Wow! thanks for posting that link.

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Giorgos
super member


Reged: 01/14/11

Loc: Athens, Greece
Re: Celestron Schmidt cameras new [Re: Eric P]
      #6083317 - 09/16/13 06:23 AM

Nice photos! I don't have a film holder to hold film cartridges but I plan to make one. I want to use color film too and I can't develop color film chips at home. Black and white is ok but I have to carry a developing tank in the field to put the film chips in it after each exposure.
IMHO the schmidt camera is the ultimate emulsion photography tool!
Kodak gold 200 is cheap and found everywhere. Who needs E200 in 35mm format?


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opticsguy
sage


Reged: 02/02/09

Loc: Washington State
Re: Celestron Schmidt cameras new [Re: Giorgos]
      #6083463 - 09/16/13 09:10 AM

Thanks for the inspiration and replies. I have waaaaay too many scopes and other items I never use and thinking to downsize and simplify. trying to sort out what items are keepers and what I might never use. Life is passing by much too quickly.

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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: opticsguy]
      #6114745 - 10/03/13 09:11 AM Attachment (13 downloads)

Hi,
this is an interesting link for reciprocity failure of various films. Fuji Acros tables are worth study/verification. Giorgo lets coordinate a common Schmidt field test.

http://home.earthlink.net/~kitathome/LunarLight/moonlight_gallery/technique/r...

Dimitris

Edited by mitsos68 (10/03/13 09:18 AM)


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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6114775 - 10/03/13 09:32 AM

Also see this one, although SC with dedicated and custom made Vahrenberg holder are rare.

http://www.robertreeves.com/kirkley2.htm

Also SC can give stunning results on comets (ISON coming):

http://www.astrostudio.at
Dimitris

Edited by mitsos68 (10/03/13 09:48 AM)


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highfnum
Carpal Tunnel
*****

Reged: 09/06/06

Loc: NE USA
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6115373 - 10/03/13 02:57 PM

not to cause a any trouble
I got both 8 and 5.5 SC but I converted mine to use ccd chip
I found cutting film bits and handling them just to much.
but dont get me wrong for those that use film - god bless


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Nightfly
Pooh-Bah


Reged: 06/20/07

Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6116109 - 10/03/13 09:23 PM

Quote:

Hi,
this is an interesting link for reciprocity failure of various films. Fuji Acros tables are worth study/verification. Giorgo lets coordinate a common Schmidt field test.

http://home.earthlink.net/~kitathome/LunarLight/moonlight_gallery/technique/r...

Dimitris





I've been using Fuji Neopan Acros 100 for years as an astrophotography film. Other than its lack of Ha sensitivity it is perhaps the best B&W film ever made for astrophotography.

It can be hypered for superior performance or just out of the box. I use it for impressive star field images. It is truly a film worth considering for B&W work. Better than Tech-Pan when it comes to blue-green and yellow-orange sensitivity when hypered.

http://nightflyphotography.blogspot.com/2010/07/adventures-in-modern-day-film...


http://www.rickthurmond.com/hyperedtechpan.html


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Giorgos
super member


Reged: 01/14/11

Loc: Athens, Greece
Re: Celestron Schmidt cameras new [Re: Nightfly]
      #6117126 - 10/04/13 12:03 PM

Dimitris send me a pm we may arrange an imaging session using our schmidts!

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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: Giorgos]
      #6124148 - 10/08/13 05:19 AM

Hi George,
now you have the cartridge holder for your camera. I wish to find free time soon. This is the major obstacle for me. That's why I tried to find a new owner for my camera. Any way, since I have the camera remounted and a good stock of fine grained films I will contact you as soon as possible for a Schmidt safari. I can help you further in the mounting of your camera.
Clear Skies
Dimitris


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Giorgos
super member


Reged: 01/14/11

Loc: Athens, Greece
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6124729 - 10/08/13 11:49 AM

Hi Dimitris! Thank you for the roll film holder! I am grateful! We shall arrange a schmidt camera safari as soon as possible!

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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: Giorgos]
      #6128438 - 10/10/13 07:04 AM

Here is an interest update approach. Not for the faint hearted!

http://www.jplnet.com/schmidtcamera/

Dimitris


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TxStars
Pooh-Bah
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Reged: 10/01/05

Loc: Lost In Space
Re: Celestron Schmidt cameras new [Re: mitsos68]
      #6130416 - 10/11/13 04:56 AM

"JSO" and "SHOWA" of japan make and made a lot of interesting telescopes and imaging cameras that we do not get to see in the USA.
If you are ever at a news stand look for the "Tenmon Guide" astronomical magazine.


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mitsos68
member


Reged: 06/21/12

Loc: Athens - Greece
Re: Celestron Schmidt cameras new [Re: TxStars]
      #6132664 - 10/12/13 09:38 AM Attachment (23 downloads)

Here is my system (guider 150mm f/5 refractor).
Dimitris

Edited by mitsos68 (10/12/13 09:46 AM)


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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 (28 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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