ICEINSPACE
Moon Phase
CURRENT MOON
Waxing Gibbous 86.9%
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25-09-2005, 08:59 AM
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avandonk
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Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
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You need to have the toucams sensor about 90 to 140 mm from the eyepiece.Try attaching the tube from the camera adapter to the step ring if it is the same thread, and then attach the toucam adapter and toucam to the tube end.Hope this is a clear explanation and it helps.
Bert
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25-09-2005, 09:11 AM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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thanks bert, I will give it a try.
The very sad thing is that both suppliers seem to know very little about the toucan in afocal setup. I suppose i am a bit of a test bunny here. As i have the modded toucam and when it comes to wider field of views with the toucam, there does not seem to be much info or pictures on this
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25-09-2005, 09:22 AM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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yes eyepiece projection.
great link, thanks
i have taken the 1.25" barrel out or the black barrel and the digi t fits along with the eyepiece, the t thread adapter fits the other end.
i now have 90 - 100mm from eyepiece glass and ccd sensor,
bert you are a legend!!
now to see what i can see!!!
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25-09-2005, 09:36 AM
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avandonk
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Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
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The only difference between an old astronomer and a young astronomer is that the old astronomer has already made most if not all the mistakes.
Bert
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25-09-2005, 09:50 AM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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true,
looking at your setup picture, is your toucam guidescope set up with or without the lens of the toucam?
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25-09-2005, 10:10 AM
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avandonk
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Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
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Yes the original toucam lens is removed.But inside the 1 1/4" to 1 1/4" adapter there is a 120mm FL 30mm dia. coated achromat about 60mm in front of the toucams sensor.This acts as a field reducer changing the 600mm F5 Saxon to a about 320mm F2.7.The effect of this is all stars are brighter and there are more in the field.So finding a guide star is easy even when pointing to an area of the sky with only dim stars.In fact the toucam easily sees stars less than mag 8 or 9 in real time ie when using guidedog.
If you ever want to image larger fields with the toucam this is the way to go.Since the sensor is only about 5mm field curvature is not a problem.
Bert
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25-09-2005, 11:16 PM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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Well, Bert, still not quite there.
Not quite long enough in the barrel.
Am i doing the right thing here for wider field of views? To image say orion, i want a nice wide field of view. Can i get that at using the above equipment and the lens out of the toucam???
I tried venus tonight, but had to move the whole setup out of the focusser to get some sort of focus. Venus was still very large!!!! I was using a 40mm eyepiece.
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26-09-2005, 12:03 PM
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Planet photographer
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Join Date: May 2005
Location: Bundaberg
Posts: 8,819
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Perhaps an extension tube is needed.
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26-09-2005, 12:09 PM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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Yes mate, it sounds like it, but it would be good if the suppliers knew a little more about it to start with. I do not like being a guinea pig! I would have thought a toucam being so popular, then afocal setups to take images at say 20 to 50x would be popular. Planets are great, but only half of the story in astronomy.
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26-09-2005, 12:27 PM
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Planet photographer
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Join Date: May 2005
Location: Bundaberg
Posts: 8,819
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How much extra outward travel do you need, do you think?
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26-09-2005, 12:30 PM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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will have another look at lunchtime at a distant hill or something, but 40 to 50mm roughly.
as they say, "I wish it said that this was required in the instructions!!!!"
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26-09-2005, 04:21 PM
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avandonk
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Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
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Eyepiece projection enlarges the image.If you want a larger field of view you need a focal reducer.What is your current setup.I have a collection of coated achromatic doublets and can send you one once I know what your focuser setup is.
Bert
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26-09-2005, 04:36 PM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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Quote:
Originally Posted by avandonk
Eyepiece projection enlarges the image.If you want a larger field of view you need a focal reducer.What is your current setup.I have a collection of coated achromatic doublets and can send you one once I know what your focuser setup is.
Bert
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Thanks Bert for confirming what my suspicions were!!
Are we talking a large enlargement? ie turning my 40mm (30x) eyepiece into a 6mm (200x). Ideally, i want to test the modified (long exposure) toucam for largish dso's ie orion etc. I want to image at 30 or 40x.
I i leave my toucam lens in, i can do ok with an adapter that clamps the eyepiece to hold everything steady, but this digit system looks so mush easier.
I will take a picture tonight of my setup and post it for you later tonight.
I have a 2" crayford with a 1.25" adapter.
Thanks again
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26-09-2005, 07:11 PM
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Registered User
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Join Date: Feb 2005
Location: Launceston Tasmania
Posts: 9,019
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Keep at it Dave, after all a focal reducer is another gadget to add to the show & tell collection. My suggestion is to pick Mikee's brains and see what advice he has to offer.
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26-09-2005, 07:21 PM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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Thanks Phil, I am not sure whether Iceman has done any low mag stuff yet as does not have a modified toucam.
Are you bringing the scope friday, I want to take some tracked images if possible!
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26-09-2005, 08:48 PM
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Registered User
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Join Date: Feb 2005
Location: Launceston Tasmania
Posts: 9,019
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Yep I'll bring the LX, probably won't be there till after 9.....
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26-09-2005, 09:04 PM
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lots of eyes on you!
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Join Date: Jun 2005
Location: Launceston Tasmania
Posts: 7,381
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cool
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26-09-2005, 09:21 PM
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Registered User
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Join Date: Feb 2005
Location: Launceston Tasmania
Posts: 9,019
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I've got a wedge also (unused at this stage but part of a longer term plan), but I won't bother with it, as I don't think we would have any chance of getting polar alignment on the first night . I should have my counterweight system by Friday, so we may also be able to bolt the 20D on and take some images that way, weather gods permitting. Let's hope the forestry burnoffs are less intrusive as well...
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