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Equipment Discussions >> Video and Electronically Assisted Astronomy

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highfnum
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Reged: 09/06/06

Loc: NE USA
mallincam with c11 f3.3
      #5834973 - 05/01/13 06:30 PM Attachment (112 downloads)

it was nice last night so
i took out the little beasty(C11)
and took a few shots - its been awhile
M51 M97 M 81


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highfnum
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Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5834977 - 05/01/13 06:31 PM Attachment (67 downloads)

m97

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highfnum
Carpal Tunnel
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Loc: NE USA
Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5834978 - 05/01/13 06:32 PM Attachment (68 downloads)

m81

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Dwight J
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Reged: 05/14/09

Loc: Lethbridge, Alberta, Canada
Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5834981 - 05/01/13 06:34 PM

The C11, F 3.3 focal reducer, and Mallincam make a great combo. I use the same setup to great effect. Nice grabs!

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dragonslayer1
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Reged: 02/25/12

Loc: SLC, UT
Re: mallincam with c11 f3.3 new [Re: Dwight J]
      #5835372 - 05/01/13 10:49 PM

very nice pictures, you have a ballpark integration time on the M51 shot please?
Kasey


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highfnum
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Re: mallincam with c11 f3.3 new [Re: dragonslayer1]
      #5835644 - 05/02/13 04:03 AM

51 was 56 sec

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Larry F
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Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5835862 - 05/02/13 09:30 AM

Nice, John!

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Atl
professor emeritus
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Reged: 04/13/12

Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5835866 - 05/02/13 09:31 AM

Question about the colored stars. Are they the actual color or is this an artifact? My camera was doing this last night but I wasn't sure what to make of it.

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highfnum
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Re: mallincam with c11 f3.3 new [Re: Atl]
      #5835867 - 05/02/13 09:35 AM

some of that square looking green blue red looking stars are
'hot pixels' not real stars
1) did not have TEC on
2) proper way is to create a dark frame and subtract to get rid of them
3) these pictures are 'graps' as you see them on HDTV


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highfnum
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Re: mallincam with c11 f3.3 new [Re: Larry F]
      #5835872 - 05/02/13 09:37 AM

thx larry

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Atl
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Reged: 04/13/12

Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5836018 - 05/02/13 10:55 AM

Ok thanks...I am still figuring out what's going on with the images I am seeing.

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dragonslayer1
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Reged: 02/25/12

Loc: SLC, UT
Re: mallincam with c11 f3.3 new [Re: Atl]
      #5836084 - 05/02/13 11:27 AM

thank you, you are using hyperstar it would seem with such a fast focal length? Which camera are you using? thank you, Kasey

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highfnum
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Re: mallincam with c11 f3.3 new [Re: dragonslayer1]
      #5836134 - 05/02/13 11:58 AM

no hyperstar- simple f3.3 SCT focal reducer/corrector
hyperstar is faster than that(2.0)
MCHP - mallincam today its considered older model


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nytecam
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Reged: 08/20/05

Loc: London UK
Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5836358 - 05/02/13 01:51 PM Attachment (22 downloads)

Quote:

no hyperstar- simple f3.3 SCT focal reducer/corrector hyperstar is faster than that(2.0)
MCHP - mallincam today its considered older model


Hi - excellent pics is hotpixel removal post processing? Regarding the quoted f/3.3 FR - is that a nominal value or the actual f/ratio on the scope? The two may not be the same. I run my nominal 3.3 FR @ f/3.6 but who am I to get technical My Owl PN from last night via Lodestar in 60s exp

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GlennLeDrew
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Reged: 06/18/08

Loc: Ottawa, Ontario, Canada
Re: mallincam with c11 f3.3 new [Re: nytecam]
      #5836405 - 05/02/13 02:10 PM

With my Meade f/3.3 reducer and Mallincam (with CCD 12.5mm below the lens mount's front surface), the 60mm long 2" visual back w/ 2"-1.25" adapter results in exactly f/3.3. This tells me that the focus must lie 72.5mm from the shoulder on the reducer's cell. This shoulder I refer to is the edge which a threaded on adapter stops against.

It could be the case that more recently made reducers are somewhat different in dimensioning...


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highfnum
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Re: mallincam with c11 f3.3 new [Re: nytecam]
      #5836411 - 05/02/13 02:13 PM

I don't know

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highfnum
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Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5839714 - 05/04/13 08:36 AM Attachment (37 downloads)

a little late adding m101 same set up

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FishInPercolator
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Reged: 04/30/13

Loc: NYC
Re: mallincam with c11 f3.3 new [Re: highfnum]
      #5869548 - 05/18/13 03:17 PM

How did you achieve a f/3.3? I asked around how to do this with a C6 f/10 and was told with the Universe version there are inevitable problems due to chip size.

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A. Viegas
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Re: mallincam with c11 f3.3 new [Re: FishInPercolator]
      #5869619 - 05/18/13 03:56 PM

Jason -

For focal reduction in a typical SCT at prime focus you can either use the Celestron or Meade F6.3 of F3.3 correctors, these you can usually find around used for $75-90. For Mallicam specifically, there is a MFR5 focal reducer you can buy that comes in two pieces, and can be put together in such a way as to get from 0.39 - 0.8x in reduction. This adapter costs $250. The FL on a C6 is what ~1500mm ? so I think you could probably achieve good results using a stock F6.3 corrector. I am not sure if the F3.3 corrector would produce too much vignetting on the C6...

Al


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Stew57
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Re: mallincam with c11 f3.3 new [Re: FishInPercolator]
      #5869730 - 05/18/13 04:55 PM

The chip size in the Universe is much larger than the mallincam extreme, X2, or VSS. Focal reducers work well with the smaller chips. You will get vignetting with the Universe with the above mentioned reducers. Celestron makes a specific reducer for large chip cameras and the HD line of scopes. These should work fine. There may be others but the reduction factor is limited.

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johnpd
sage


Reged: 04/13/08

Re: mallincam with c11 f3.3 new [Re: FishInPercolator]
      #5870790 - 05/19/13 05:44 AM

Quote:

How did you achieve a f/3.3? I asked around how to do this with a C6 f/10 and was told with the Universe version there are inevitable problems due to chip size.




The camera he was using was the older MHCP (Mallincam Hyper Color Plus) not the Universe. With the smaller chip Mallincams, f/3.3 works fine. Also, as I recall Rock saying, the Universe is more suitable for larger telescopes.

JohnD


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GlennLeDrew
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Re: mallincam with c11 f3.3 new [Re: johnpd]
      #5872725 - 05/19/13 10:36 PM

The Universe would work well with ordinary camera lenses too. It's not the aperture itself which is so important, but rather the field size you wish to cover. With Universe you could attach an 8mm f.l. (~4mm aperture!) fisheye lens to obtain an all-sky image.

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