By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Oct 22nd

I finished a project!

All Topics | Latest Posts

Search for:  in Thread Title in  
Neil Wyatt07/09/2018 19:50:13
avatar
Moderator
16655 forum posts
687 photos
75 articles

Telescope built around a Skywatcher 66 ED lens cell.

66ed (1).jpg

66ed (2).jpg

66ed (3).jpg

66ed (4).jpg

66ed (5).jpg

66ed (6).jpg

66ed (8).jpg

Neil

Brian H07/09/2018 20:15:06
avatar
1269 forum posts
98 photos

Very Impressive Neil.

Brian

Brian Sweeting07/09/2018 20:39:55
382 forum posts
1 photos

Excellent work Neil.

Harry Wilkes07/09/2018 20:56:46
avatar
727 forum posts
60 photos

Looking good wink

Emgee07/09/2018 21:45:11
1240 forum posts
210 photos

Impressed with your work Neil, nice job.

Emgee

John Penfold07/09/2018 22:16:07
23 forum posts
3 photos

I am sure that felt good. Well done.

J

Mick B107/09/2018 22:28:15
1214 forum posts
70 photos

Excellent work - will we be seeing the output on the Astro images? smile

charadam07/09/2018 23:07:24
180 forum posts
6 photos

Very nice job Neil.

Serious question, if I may.

Does all the bright white lettering in front of the lens make a measurable difference to image contrast/quality?

David Taylor07/09/2018 23:22:54
avatar
128 forum posts
39 photos

Impressive!

Ed Duffner08/09/2018 00:17:43
730 forum posts
61 photos

Nice work Neil,

Is, or are the lens' APO as the ring suggests?

Ed.

Neil Wyatt08/09/2018 08:39:55
avatar
Moderator
16655 forum posts
687 photos
75 articles
Posted by charadam on 07/09/2018 23:07:24:

Very nice job Neil.

Serious question, if I may.

Does all the bright white lettering in front of the lens make a measurable difference to image contrast/quality?

I'm sure some contrast-obsessives go over them in black sharpie. I would guess they are low down enough for virtually all the light to be reflected off the front of the lens and any left would hit the internal baffle.

More noticeable are the letters reflecting in the dew shield. This means a coat of heatproof black paint is needed over the anodising.

Neil

Neil Wyatt08/09/2018 08:45:05
avatar
Moderator
16655 forum posts
687 photos
75 articles
Posted by Ed Duffner on 08/09/2018 00:17:43:

Nice work Neil,

Is, or are the lens' APO as the ring suggests?

Ed.

Not strictly, it's an ED doublet and no doublet can be truly apochromatic, but its performance is closer to a true Apo than an ordinary achromat - Skywatcher are bit cheeky, most scope builders call them 'semi achromatic'.

Neil

Neil Wyatt08/09/2018 08:50:34
avatar
Moderator
16655 forum posts
687 photos
75 articles
Posted by Mick B1 on 07/09/2018 22:28:15:

Excellent work - will we be seeing the output on the Astro images? smile

That's the plan all along!

I have a telephoto lens the same focal length that frames things well, but has too much chromatic aberration. This scope should be great for larger objects

Neil

The Oily Rag08/09/2018 09:06:50
48 forum posts

That's very impressive work Neil

mechman4808/09/2018 18:53:11
avatar
2503 forum posts
371 photos

That looks a real pro job Neil, give that boy a gold star for the week... devil

George.

Paul Ainsworth25/10/2018 10:39:49
92 forum posts
15 photos

Looks great, I tried Astro photography with a telescope once, not very successfully. Ended up just shooting Lunar pics with a 300mm f4 and 1.4 tc as it was a lot easier.

Nick Hughes25/10/2018 11:36:37
avatar
203 forum posts
130 photos
roy entwistle25/10/2018 12:35:13
1049 forum posts

What's the last post doing on here ? face 7

Adrian 225/10/2018 12:43:02
70 forum posts
19 photos

Beautifully made Neil. I feel humble.

Adrian.

Ian S C25/10/2018 13:16:27
avatar
7447 forum posts
230 photos

Nice one Neil, in the spirit of ME of old, although those guys ground there own mirrors.

Ian S C

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
Warco
Meridienne; London MES
Eccentric Engineering
Eccentric July 5 2018
TRANSWAVE Converters
ChesterUK
Ausee.com.au
cowbells
Allendale Electronics
emcomachinetools
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest