Takahashi FS152 VS. Starmaster 14.5″ Hybrid

[torana68 (Roger)]

Originally Posted by Daniel Mounsey

.... Ironic since it's devastating to images depending on the angle. I would definitely stick to solid tubes when practical. They hold collimation better as well.

ok, i dont own an open tube Newtonian so this is just out of interest, would the degradation be in the order of say 5% at worst (compairing to a theoritical 100% perfect image)? when you say images do you mean visual? thanks for the input.
Roger

[gb_astro]

Originally Posted by Daniel Mounsey

This is my first post on this site. That is correct, the shroud does not protect against body currents, in fact even if you were wearing a thick down coat, it too, would not stop the heat currents. I would also like to thank gb for correcting the number of misunderstandings about my review.

Regards,
Daniel Mounsey

Daniel, welcome to the forum, although you
must feel like you have just walked in on a bar room brawl.

The usual IIS spirit of co-operation
seems to have have gone AWOL on this one.

I am a bit surprised though that you find a thick down coat
or similar insulation does not reduce the problem.
Logically it should.

(Anyone have a thermal imaging camera? )

gb.

[Daniel Mounsey]

Originally Posted by torana68

ok, i dont own an open tube Newtonian so this is just out of interest, would the degradation be in the order of say 5% at worst (compairing to a theoritical 100% perfect image)? when you say images do you mean visual? thanks for the input.
Roger

I've never really thought of it like a percentage. The simplest way to describe it is to say that an observer can harm delicate images like double stars and planets. It makes the images soft and fuzzy.

[torana68 (Roger)]

Originally Posted by Daniel Mounsey

that an observer can harm delicate images like double stars and planets. It makes the images soft and fuzzy.

righto, gotcha. thanks for your thoughts
Roger

[Hagar (Doug)]

Daniel. Welcome,,,, Looks like you must be a bit more precise with your wording. On this forum images refer to camera images and you will incur the wrath of Mr Bambury. He has a definite hatered for imaging of any kind. (Before you sink both feet again John. You were the BIG voice against the IIS Compendium for Astro imagers and had quite a bit to say about the quality of the images shown in this lovely book. Not bad from one who doesn't image.) To be politically correct you had better refer to it as Visual observations.

Again welcome Daniel, but I would have thought the temprature rise accross on open scope with the body close would have only been a microscopic amount and wouldn't have caused aberations as high as the quality of even the best mirrors. It does open up a lot of concerns for me as an imager trying to image through many layers of atmosphere all with differing thermal values.

[marki]

Originally Posted by Hagar

Daniel. Welcome,,,, Looks like you must be a bit more precise with your wording. On this forum images refer to camera images and you will incur the wrath of Mr Bambury. He has a definite hatered for imaging of any kind. (Before you sink both feet again John. You were the BIG voice against the IIS Compendium for Astro imagers and had quite a bit to say about the quality of the images shown in this lovely book. Not bad from one who doesn't image.)

Not to mention the personal attacks against the people who contributed. Don't know why you bothered Doug.

Mark

[Daniel Mounsey]

No problem gentleman. It's a pleasure to be in your forum and i like the candidness down under. Good point on not using the "images" term. "Views" for lack of a better word. Ice In Space is a fantastic name for a site.
Best,
Daniel

[Jen]

Originally Posted by Hagar

Dougs in the back row throwing Jaffas.

Jen eats the jaffas

[desler]

Does the three second rule apply Jen?, I may be able to support you in those efforts.

Darren.....

[Jen]

Originally Posted by desler

Does the three second rule apply Jen?, I may be able to support you in those efforts.

Darren.....

[mbaddah (Mo)]

Hi Daniel welcome to IIS.

Some very informative comments made...

gb would be great if someone had a thermal camera to test it out I would have thought a shroud would prevent a problem like this from happening as well.