Slight issue with OAG

[chrissuddell]

Morning,

Just wanted to see if there is anyone a lot wiser here than I who could help me out a little.

My setup I was trying to test the other night is a QSI583WS, attached to a Brightstar Astro Off-Axis Guider, at the pointy end of the setup is a Astro Physics CDT67 telescompressor approx 100mm from the focal plane (105 to get .67) and then this is attached to a Meade 8"ACF (underrated scope).

I might be going nut's but when I was out the other night I could not find a guide star, the guide cam is a QHY6, sensitivity is not an issue.

Now I have not done any imaging for a year, but I could have sworn blind I used this setup befoe and it was ok, but without the CDT67 telecompressor. I'm wondering if the light cone to the chip is missing the pickup mirror? Any thoughts?

The QSI unguided images I was getting was flat and tight across the chip.

I'm going to try to get focus today in the daylight just to check, but its driving me nuts.

Chris

[Tinker1947]

Does the prism need adjusting i think it can be angled via a small screw found where you insert the guider ccd......

[r3i]

I use a CCDT67 with the Orion OAG, which I believe is the same as the BrightStar, just a different badge. These are used on my 8" RC with a QHY8 camera. The setup works very well and I have no problems finding guide stars so I don't think there is anything fundamentally wrong with your equipment in terms of compatibility. Definitely try the setup during daylight and aim at something in the distance such as an electricity pylon or a neighbour's TV aerial. Doing the basic initial setup during the day gives you plenty of time to get it sorted.

[Jessun]

(105 to get .67)

Remember that the reducer itself is 16mm of the total distance in your calculations. 101mm gives the stated 0.67, so that means 85mm from reducer to CCD glass remains once the built in 16mm have been subtracted.

/Jesper

[chrissuddell]

Hi,

Goog to head the GSO RC and CCD67 works thats very similay to my setup so I should be ok, its probably been knocked about a bit when it was in a box for a year.

I'm going to try a daylight focus and see where I go from there. My QHY6 2x2 nomally picks up any guide star even at f20 and I tested it so I should be ok. I just dont want to go back to my old guiding setup.

I'll keep you posted.

Chris

[chrissuddell]

Ok, I have managed to image a brick wall at 150 feet with the QSI and QHY6 attached. See below.

Ha Brick wall APCDD67 Brightstar OAG then QSI583, scope Meade 8" ACF

.0001 sec exposure 2x2 QHY6CCD 16% gain on the Brightstar OAG

then the setup...

<a href=" title="QSI Brick Wall Ha by chrissuddell, on Flickr"><img src="http://farm8.staticflickr.com/7385/9691998811_d43f3389ec_c.jpg" width="800" height="602" alt="QSI Brick Wall Ha"></a>

<a href=" title="OAG QSI Brick by chrissuddell, on Flickr"><img src="http://farm8.staticflickr.com/7449/9695230408_51f7a20736_n.jpg" width="320" height="238" alt="OAG QSI Brick"></a>

<a href=" title="Canon Camera little one 192 by chrissuddell, on Flickr"><img src="http://farm8.staticflickr.com/7309/9695266616_655ae79b99_c.jpg" width="600" height="800" alt="Canon Camera little one 192"></a>

[chrissuddell]

Anyone know how to go back and edit a posting....

[Tinker1947]

Anyone know how to go back and edit a posting....

You need more posts...not sure of how many,,,,might be 50....

[dmahon]

Should work fine - though if I had a QSI camera I think I'd get their own OAG upgrade.

[chrissuddell]

Hi,

I tried the WSG case and it has two issues 1) it does not work with my QHY guide cam and 2) it does now work with my L series canon lenses so I went for the £90 option, which I now have working, I had managed to knock the prism out of alignment. My scope collimation was out, but this is 7x10 Min Ha no Flats or darks.

Chris

[r3i]

I had managed to knock the prism out of alignment. My scope collimation was out, but this is 7x10 Min Ha no Flats or darks.

Looking very good indeed - glad to see that you got sorted.