ASI034mc Focal Length

ASI's Range of Specialised CMOS camera's

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windscorn
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ASI034mc Focal Length

Post by windscorn » Sun Jan 26, 2014 10:09 pm

I have been trying to figure out what focal length of eyepiece is equal to the camera for use in my flip mirror. The closest I have is Zhumell planetary eyepieces in 6 and 9mm although neither appear to be the same magnification as the camera. Has anyone determined what the equal size would be?

Also, is there a Focal "sweet spot" such as F/30 or a range in which the camera performs best?

Thanks in advance. MJ

riklaunim
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Re: ASI034mc Focal Length

Post by riklaunim » Mon Jan 27, 2014 12:33 am

f/30 may be bit to much for it. I would stick to around f/20 on average seeing and use f/25-30 if it's really good.

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Sam
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Re: ASI034mc Focal Length

Post by Sam » Tue Jan 28, 2014 9:48 am

F30 is a good experience value for camera which pixel size equal to 6.0um such like SPC900NC and ASI034MC
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riklaunim
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Re: ASI034mc Focal Length

Post by riklaunim » Tue Jan 28, 2014 6:10 pm

Both have 5.6µm pixels, and I did a lot of imaging with such sized pixels. f/30 is not easy nor for average seeing.

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Sam
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Re: ASI034mc Focal Length

Post by Sam » Wed Jan 29, 2014 5:21 am

riklaunim wrote:Both have 5.6µm pixels, and I did a lot of imaging with such sized pixels. f/30 is not easy nor for average seeing.
sorry, I remember wrong. its 5.6um pixels.
f/30 is not easy. but that's what we expect :)
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JamesF
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Re: ASI034mc Focal Length

Post by JamesF » Wed Feb 19, 2014 11:40 pm

To return to the OP's question, I'm afraid it isn't really a meaningful thing to ask.

A camera does not magnify at all and has no focal length. You can calculate the size of the image on the sensor easily enough given the effective focal length of the optical train, but that doesn't really answer your question at all.

What are you actually trying to achieve?

I don't have an ASI034MC, but I used to use f/30 to f/35 quite happily with my SPC900 and 127 Mak so if conditions allow I'd certainly suggest trying it. Now I use an ASI120 and tend to stay much closer to f/20 to f/25.

James

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