Reducer spacing diagram

[blinky]

Hi,

 

I can never find the diagram I want 0 the one that shows if you are too close or far from the correct reducer spacing - maybe one of the mods could pin it once its found?  Anyway, is this image from the top right corner too close or far?

[teoria_del_big_bang]

Do you mean this diagram (last post on page)

https://stargazerslounge.com/topic/225831-flattener-spacing/

 

Steve

[Davey-T]

3 minutes ago, blinky said:

I can never find the diagram I want 0 the one that shows if you are too close or far from the correct reducer spacing - maybe one of the mods could pin it once its found?  Anyway, is this image from the top right corner too close or far?

There's one on the Altair Astro website.

Dave

[blinky]

That's the one - so this is too close then....

[teoria_del_big_bang]

7 minutes ago, blinky said:

That's the one - so this is too close then....

I am not sure - is that the whole frame or a crop ?

My eyes are not the best but all the stars look slightly elongated but in same direction (to my weary eyes anyway)

Steve

[blinky]

No, that's just the top left, the centre of the frame is ok - went outside to adjust it and its all misty!  Will take a peek in an hour or so and see if its cleared

[teoria_del_big_bang]

Then yes I agree too close 🙂 

Steve

[blinky]

Also.... Just to confirm Im not being silly... The WO FLat 73a flattener I have is adjustable, I had it set around the 11.4mm but have just increased it slightly, this is the correct thing to do yeah?  I mean I should not need to leave it at 11.4 and then put in spacers between the camera and the flattener?  Sorry for the silly question!

[teoria_del_big_bang]

My flattener for my Z73 is the fixed one so that is what I have to do but I believe the adjustable one means you have done the right thing.

Steve

[teoria_del_big_bang]

Do you have a filter in between flattener and camera. if so you need to add 1/3 of the filter thickness to the 11.4 mm.

Steve

[blinky]

Cheers Steve, it makes it a bit easier to adjust then, otherwise its disassembly, insert Delrin spacer, then reassemble, test and repeat!

[blinky]

Just now, teoria_del_big_bang said:

Do you have a filter in between flattener and camera. if so you need to add 1/3 of the filter thickness to the 11.4 mm.

Steve

I do - I have the ZWO 7 position filter wheel with LRGB/Ha/O3/S2 filters, so looks like Im correct to expand it a little then

[teoria_del_big_bang]

I think the adjustable flattener is a great idea, unfortunately is cam on the market just after I bought mine otherwise I would have loved one.

Steve

[teoria_del_big_bang]

Just now, blinky said:

I do - I have the ZWO 7 position filter wheel with LRGB/Ha/O3/S2 filters, so looks like Im correct to expand it a little then

Yes, I have Baader filters at 2 mm thickness so need to add about 0.7 mm, I think I read somewhere the ZWO ones may be 3 mm so looks like you may need to add 1mm.

Steve

[Anthonyexmouth]

50 minutes ago, Davey-T said:

There's one on the Altair Astro website.

Dave

The one on the Altair site was totally backwards for me. said i needed to reduce space but i ended up having to add and that was with their reducer/flattener

[blinky]

Really misty out there but I adjusted it a little and it seems better, think it still needs a tiny tweak but its certainly in the right direction!

[david_taurus83]

That diagram means absolutely nothing in my experience. I get better results if I interpret it the other way..