M13 with home made Schmidt scope

[Nebulium]

Hi to all

This picture (pls, click on below thumbnail):



was took by a friend of mine with a 300D inside a home made F/3 Schmidt scope.

Pls, I'd like you guess the diameter of the mirror. Tuning of the instrument in progress

and give objective opinions about this picture.

Many thks

Neb

III

[Bojan]

Hmmmm Do you have a bigger picture?
Home made Schmidt.. This is quite a project :-)...

[George]

...Pls, I'd like you guess the diameter of the mirror. Tuning of the instrument in progress

and give objective opinions about this picture.

I'll do both, I'll guess the objective is about 7 inches, assuming a few things.

The formula is (57.3/fl) x 22.7 = field of view. I guessed about 1 degree for the field at its widest. The 22.7 is the sensor width, in mm, on the Canon 300D. [I am going on memory for all the above, so I could be wrong.]

A beautiful image.

[George]

BTW, show us your homemade scope.

[mickal555]

Hmmmm Do you have a bigger picture?
Home made Schmidt.. This is quite a project :-)...

Just click on the thumnail

You'll be in for a treat Brillient image

[Arneb]

I agree, an absolute treat. The cluster resolves right down into the centre.
I haven't done the calculations our heliochromologist did, but yes, I had figured something like 6" or 8".

[Bojan]

Just click on the thumnail

You'll be in for a treat Brillient image

AHA... :-) I am normally using Firefox and all I could see was a link.. which resulted in a thumb upon clicking and that was it.
But with Explorer... yes... it is a real treat :-) beautiful!!

The resolution is great all over the field of view. However I think the optical system needs additional bit of adjustment, the stars (brighter ones) tend to be slightly elongated in up-down direction (coma?).

But, what am I talking about? If this was my homemade Schmidt..... I would be at the top of the world :-)

[tegwilym]

Any photos of the homemade Schmidt? I never heard of anyone building something like that. Do you have a photo of it you can post?

Tom

[Nebulium]

Hi

Another pic with better conditions :


http://img91.imageshack.us/img91/5382/m132images1du.jpg

The picture of the scope was shot with another camera (using an ordinary flat mirror didn't work right...) and sent to the lab for processing

It'l be nxt available

[mickal555]

Hi

Another pic with better conditions :


http://img91.imageshack.us/img91/5382/m132images1du.jpg

The picture of the scope was shot with another camera (using an ordinary flat mirror didn't work right...) and sent to the lab for processing

It'l be nxt available

Another great image!

[tdvance]

I think it's a good image. I think any image of M13 that shows the "propeller" (Y shape slightly dimmer than surrounding star glow) is a good image! Many images do not show that.

Todd

[mahesh]

Hi

Another pic with better conditions :


http://img91.imageshack.us/img91/5382/m132images1du.jpg

The picture of the scope was shot with another camera (using an ordinary flat mirror didn't work right...) and sent to the lab for processing

It'l be nxt available

Thanks Nebulium....simply awesome picture!
(....and a warm welcome to you...)

[CharlesBell]

I lke the image.

I would like to know more about the scope.

How did you guide this image? Is it on an equitorial mount?

[ToSeek]

Gorgeous.

[Nebulium]

Hi to all

Many thks for your kind comments.

My friend has built a really big scope (not his first Schmidt, but its first so big).
The present results are jeopardized by local seeing conditions near the scope (always ) and too much frequently outside. And the thin mirror cell needs a little more trimming.

So, as results yet are not and too far from expected ones , my friend don't like that I speak very much about his BigSchmidt.

As of today I just can say that it's using a huge EQ fixed fork mount built on a concrete floor.