Coronado/William Optict mod

[david61]

hello i would like to do this

can you do it with william optics 66

where can i get the erf filter from ??? and how much do they cost

i was told today for the 80mm the erf filter is £250

thanks dave

[Milamber]

http://www.baader-planetarium.de/com/Bestellung/Baader-products-0207-P.pdf

Page 8 has the C-ERF listing. €225 for the 80mm

Arthur

[Jamie]

David

The only bit that made me change my mind in which scope to use was that it

might need to be shortened IE cut the telescope barrel...So i got a scope just for that purpose... 8)

Plus David i know a fair bit about solar viewing and am constantly picking the brains of the likes of other

solar astronomers and engineers. (just to stay on the safe side)

Remember Always stay safe!!!!

[Solar B]

http://www.baader-planetarium.de/com/Bestellung/Baader-products-0207-P.pdf

Page 8 has the C-ERF listing. €225 for the 80mm

Arthur

Thats for the 70mm Arthur......just right for the 66mm scope mind you......the 90mm is 345 which compares to the AE one which is also 90mm but only 86mm mounted. Brian

[Milamber]

Well, I had allowed for a little f-reduction since when I used the 150mm it was a bit of a sod to focus. Using the ERF (which at best would be 67mm) would help to achieve focus, both with a camera and visually.

[Jamie]

Hey Arthur.

I got the PST - 2" adapter this morning. 8)

And a nice piece of work it is too...

Mucho gracias hombre.....

[Milamber]

No problem - keep safe!

Arthur

[Jamie]

As requested here is the finished article.

It is now an 80mm HA solar telescope.

Here are a couple of pics enjoy....

I expect to get first light with this very soon and when i do i will post a report...

[Whippy]

Looks great mate, looking forward to the first light report .

Tony..

[Solar B]

Looking good Jamie....and worth the long wait are you sure thats not an 86mm internal diameter ERF

you,ve got there....look forward to seeing it for myself. Brian

[Beyond_Vision]

Great looking mod Jamie bet you are looking forward to first light

Regards

Kevin

[winfij]

Looks good Jamie,

Which donor scope/ERF/mounting cell did you use in the end?

I've got a 90mm scope lying around I bought for this mod, but I need to get the ERF and mounting cell still.

John

[Jamie]

Hi John

The donor parts came from a new type PST ethalon and a Helios ST102 OTA , the ERF is the Astro Engineering one (one of the best on the market i have been reliably informed)

Astro Engineering also made the cell that the ERF is housed in.

Arthur/Ambermile kindly donated an ethalon to 2" adapter (the importance of these things being made properly cannot be highlighted enough)

I just can't wait to get out and use it.

[winfij]

Thanks Jamie.

Is the ERF/cell a standard stock item or was it a custom order - I took a look on their website and couldn't find it.

ALso, (if you can bear a few more questions...) do you know what the clear aperture of the ERF is, along with the range of scope outside diameters the cell will mount onto?

Now the new solar cycle is starting up, it'd be a good time to finish off my conversion project.

Cheers,

John

[Jamie]

Thanks Jamie.

Is the ERF/cell a standard stock item or was it a custom order - I took a look on their website and couldn't find it.

Also, (if you can bear a few more questions...) do you know what the clear aperture of the ERF is, along with the range of scope outside diameters the cell will mount onto?

Now the new solar cycle is starting up, it'd be a good time to finish off my conversion project.

Cheers,

John

The ERF is a stock item but not listed in this particular size 90mm.

The cell was custom made to fit MY scope.

Clear aperture of the ERF is 86mm.

The scope i used was a 102mm refractor so i will get the full aperture of the ERF....

The custom made side of things will need to be discussed by you with whom ever you buy it from..