Question about DSLR mounted on a Newtonian

[Olorin]

Hi,

I have just bought a new Canon 550D

I have everything I need to mount it on my SkyWathcher 200P but...

The Camera's chip is exposed basically there is nothing preventing dust to arrive to the chip. I guess I need some kind of a filter to be placed on the SkyWather ring I connect to (there is a place to screw a filter) the question is what filter will fit me? My intention is to image both DSO's and planets (if different filters are a must I will have to live with it...)

Thanks

Dror

[yesyes]

A light pollution filter might be a good choice...

[reddoss]

DSLR's are good for DSO's but for planets you need a video camera. This is because to planets shimmer through the atmosphere. As a result they only appear in focus for a fraction of a second. Many people use a cheap modified webcam. See this recent thread.

http://stargazerslounge.com/discussions-cameras/186384-new-imaging.html

[Olorin]

thanks for your replies, Chris sounds like a good advice. Any idea what is the size of this filter (I don'e think it's a standard 2" and it is definitely not 1.25")?

Reddoss I am well into webcams (check my images in the planetary imaging section) however DSLRs with video crop (such as the 550D) are well fit to handle also planetary imaging, thanks for your help

Dror

[SamAndrew]

The chip isn't exposed to the air, it's already behind an IR filter and another screen that vibrates to remove dust, you can clean it with a jet of compressed air, I wouldn't worry too much

[garethmob]

green witch sells this

Baader Solar Film Filter

the clear turbo film, iv never used it but it might be what your looking for but to note it isnt a solar filter so dont look at the sun with it

[Carbon Brush]

An Astronomik CLS filter is a good investment for imaging.

I have one resident in my 1000D.

Check my album for the before/after image.

Not exactly the item your were looking for, but useful.

[Olorin]

thanks everyone for your good advice

Dror

[Gina]

I use an Astronomik CLS clip-in filter. Blocks LP as well as keeping dust out ans being a clip-in filter is always there when the camera is removed from the scope.