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Hi

Here is my last big project:

A 6-part mosaic of the veil nebula

Made with a 5" f5 Skywatcher Newton, the ASA 0.73 Reducer-Corrector and a modified Canon 500D

4h exposure time for each part, total 24 hours. Combined with Theli

cirrus-2012_08_15.jpg

more details and higher resolution: http://www.distant-lights.at/cirrus-2012_08_15.htm

NGC 6992:

ngc6992-2012_08_12.jpg

http://www.distant-lights.at/ngc6992-2012_08_12.htm

NGC 6960:

ngc6960-2012_07_24neu.jpg

http://www.distant-lights.at/ngc6960-2012_07_24.htm

Hope you like it

Clear Skies

Thomas

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Wonderful :)

That's my WIP project ATM but I'm not making much progress :( Had a couple of nights the seemed promising at first but on Tuesdasy night (I think it was) it started clear but soon the clouds came over. Then last night I persevered for 5 whole hours with guiding running well but too little in the subs and the result of stacking 3 dozen or so lights plus darks, flats and biases only produced something resembling one sub on a decent night :( I should have had an early night instead :D

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I'm really tempted by that reducer too........ pricey though...

How do you get your collimation so perfect ?

I've got the bigger skywatcher newt but am having awful problems with focal plane tilt...... you've got your scope set up beautifully and it shows!

Cracking picture.

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Hi

Thank you for your nice comments, I'm very glad that you like this images.

@ Gina: I dont'n know how many times I've set up my equipment for this pictures and after the first shots the stars disappeared behind clouds. Thats astrophotograpy

@laser_jock99: The ASA 2" Reducer-Corrector works very well, but does not correct the whole APS-C field of a DSLR. Either you cut the borders (~ 10%) or you can live with slightly deformed stars in the edges.

The second thing is that the corrector sets the focus point inward (~2 cm). I have turned the primary mirror inward with longer screws

@badgers:

How do you get your collimation so perfect ?

I don't know, but it took a long time until it was so. But even now it's not perfect, responsible is the focuser, mirror cell, ...

Thomas

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That ASA reducer certainly is interesting, seeing superb results like this makes me very tempted to get one. I think it might work with a 150P as im sure there is more than 20mm in-focus to play with, but i'd better check.

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Thanks for your comments.

@uranium 235: Of course the reducer will work. You will only need patience to try out the right distance Chip-Reducer (with my setup 61mm).

Maybe the 20mm is not enough, but there is the trick with the longer screws in the primary mirror cell.

Thomas

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  • 2 years later...

That ASA reducer certainly is interesting, seeing superb results like this makes me very tempted to get one. I think it might work with a 150P as im sure there is more than 20mm in-focus to play with, but i'd better check.

What are you waiting for :D 

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