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Neil Wyatt07/09/2018 19:50:13
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Moderator
17052 forum posts
690 photos
76 articles

Telescope built around a Skywatcher 66 ED lens cell.

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Neil

Brian H07/09/2018 20:15:06
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1389 forum posts
100 photos

Very Impressive Neil.

Brian

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

Excellent work Neil.

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

Looking good wink

Emgee07/09/2018 21:45:11
1344 forum posts
212 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
1348 forum posts
75 photos

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

charadam07/09/2018 23:07:24
181 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
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128 forum posts
39 photos

Impressive!

Ed Duffner08/09/2018 00:17:43
745 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
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Moderator
17052 forum posts
690 photos
76 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
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17052 forum posts
690 photos
76 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
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17052 forum posts
690 photos
76 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
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2549 forum posts
385 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
94 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
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210 forum posts
131 photos
roy entwistle25/10/2018 12:35:13
1100 forum posts

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

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

Beautifully made Neil. I feel humble.

Adrian.

Ian S C25/10/2018 13:16:27
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7467 forum posts
230 photos

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

Ian S C

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