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  #1  
Old 03-04-2017, 07:10 PM
DJT (David)
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STL 6303e v 11000M conundrum. Thoughts?

I am in a position where I will be able to swap my STL6303e for an STL11000 but am dithering. The intent is to put one of them on the back of the FSQ106n

The QE on the 6303 is around 40-50% higher than the 11000 which tops out around 50% but the blooming is a nuisance. I stopped RGB imaging from Sydney a while ago, focussing on NB but if I go out to the dark site the LP issues would be resolved and I will hopefully capture some of the faint stuff.

However, to get the faint stuff I would shoot longer than I would for RGB in Sydney. With the 6303 the blooming will slay me, especially on the faster scope.

I will keep the RC in Sydney and carry on with the NB but probably try a different CCD.

So, 6303e v 11000 on the back of the FSQ. What am I missing here? Both are running at an image scale of 3.5 but the 11000 would make better use of the large flat field but has a lower QE?

Any guidance would be greatfuly accepted.

Ta

Last edited by DJT; 03-04-2017 at 09:58 PM.
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  #2  
Old 03-04-2017, 07:51 PM
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Atmos (Colin)
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Personally I'd go a 16200, not quite as big as the 11002 BUT is far ahead in other ways. Having smaller pixels it takes good use do the large flat field too
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  #3  
Old 03-04-2017, 08:49 PM
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what Colin said. But I hve used 2 STL11s with an FSQ and they are an excellent match indeed.

11002 and FSQ is a match made in heaven. The FSQ is one of the few instruments that will have round stars corner to corner on an STL11.

It makes for an appealing image for many objects. The image scale does not seem as relevant when its a wide field scope. You certainly negate the seeing that way too.

Greg.
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  #4  
Old 03-04-2017, 10:00 PM
DJT (David)
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Quote:
Originally Posted by Atmos View Post
Personally I'd go a 16200, not quite as big as the 11002 BUT is far ahead in other ways. Having smaller pixels it takes good use do the large flat field too
Thanks Colin but definitely off budget at the moment.


Greg, thanks for the response. I just updated the model and it's the 11000m rather than the 11002 so I suspect there are subtle differences?
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  #5  
Old 04-04-2017, 06:17 AM
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Slawomir (Suavi)
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Hi David,

To my knowledge STL11000M has KAI11002 interline sensor. As you mentioned, peak QE is about 50%, while KAF6303 (full frame) has peak 68% QE. Difference is QE is somehow significant, but with FSQ your camera will be very sensitive anyway, even in narrowband. One thing to consider is the need for larger filters with KAI11002. I have no direct experience in using such setup, but from seeing images on the net, I can second what Greg said - it surely would make a wonderful wide field and fast system.
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  #6  
Old 04-04-2017, 09:01 AM
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Octane (Humayun)
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I can't speak to the 6303, but, I also feel that my STL-11000M/FSQ-106N match is one that was made in heaven.

I have been concentrating on narrowband from the southernmost populous suburb of Canberra. All my narrowband exposures are 30-minutes long. No dramas.

H
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  #7  
Old 04-04-2017, 11:31 AM
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gregbradley
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Quote:
Originally Posted by DJT View Post
Thanks Colin but definitely off budget at the moment.


Greg, thanks for the response. I just updated the model and it's the 11000m rather than the 11002 so I suspect there are subtle differences?
The differences between the 11000M and 11002 are subtle. As I recall it was more to do with timing issues sometimes encountered with the 11000. I don't think there is any difference in QE etc.

STL11 will require 50mm round filters. But I think the 6303 will also. Its quite a large sensor even though it 6.3 megapixels. I haven't used one but I think it was common to use 50mm round there as well.

Greg.
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  #8  
Old 05-04-2017, 06:23 AM
DJT (David)
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Thanks for your input everyone.

Because I still want to do NB from Sydney I am going to keep the 6303. As I can't stump up for a full frame CCD this year ( cfo points all used up) I will be throwing a Hutech astro modded 5d MKII I picked up from the SB scientific site for 2 parts of nothing, on the back of the Tak when I am up at the dark site.

looking back at my imaging notes for the last 2 years I have taken so few images from there (weather/social/other stuff getting in the way) that this will do for now.

Quite looking forward to doing a bit of DSLR work..should be fun.

Cheers
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