MFR use on Mallincam
Posted 09 January 2008 - 10:29 PM
I can see that the true field of view (TFOV) of any CCD will be fixed. I have read some place that the Mallincam Hyper has a TFOV around that given by an 8mm EP, but thats not telling me very much, since I do not know the field of view (FOV)of the 8mm EP.
Can anyone give me an idea of the TFOV of a Mallincam fitted in a couple of different ways.
With 1.25" Nosepiece.
With MFR 3.
Also not really up on the use of Extensions to change the efffective FOV?
Posted 10 January 2008 - 01:23 PM
Posted 10 January 2008 - 05:35 PM
Posted 10 January 2008 - 06:03 PM
How long are the integration times? Is this what it would look like real time on the monitor?
Trailing stars mean unguided images, right? I'm trying to get a feel for what reality is with the Mallincam and whether it would be practical with my Vixen NA140 mounted alti azimuth.
Also, what is a TOA 150 (Tak?) and what is its f/ratio?
Posted 10 January 2008 - 06:27 PM
The ob-long star are from the video card in my laptop being 16x9 and the MCH is 4x3. I have problems from time to time changing them back.
On a monitor yes thats what I see plus round stars.
Posted 10 January 2008 - 06:44 PM
What about faint nebulosity...the surface brightness of M27 is relatively bright.
How would the Veil look like, for example. I would imagine you would have to stack a lot more frames for a similar view and that would mean guiding...right?
Just kicking tires at this point but definitely getting interested in this technology.
Posted 10 January 2008 - 07:06 PM
I forgot 28sec.
Faint nebulas. It really depends on the nubula. M57 takes less exposer time than M27.
I have seen the Veil at 56sec it shows some detail and color in a 6" scope.
I havent tried stacking frames, but alot of people do and get great images.
I havent tried the MC unguided. Hopefully some else can give you an answer.
Posted 10 January 2008 - 07:58 PM
Well I'm going backside and see what else I can see without tracking or conditions I wouldn't even bother with usually.
Posted 10 January 2008 - 08:12 PM
Here is a shot of M27 with and without the Mallincam FR. Scope was a TOA 150.
Thanks very much for posting such interesting pictures.
They make it very clear that the TFOV is increased by quite a bit with the addition of the MFR.
I can see that imaging wide DSO's without the MFR will be restricted. Looks like I will add one to my shopping list.
Do you use the 10mm extension rings to increase the effect on TFOV?
Posted 10 January 2008 - 08:28 PM
Brads setup using MFR the TFOV = roughly 49 min x 38min.
Without MFR TFOV = roughly 27min x 21 min
A significant gain in field of view.
Posted 11 January 2008 - 10:00 AM
Here is a shot of M57 taken the same night as M27 was. First with FR second without. Single frames no processing.
Iam not for sure about the exposer time.
Posted 11 January 2008 - 12:13 PM
Of course, you could tell it came today by looking at my CSC... - j
Posted 11 January 2008 - 01:07 PM
I know the feeling about the weather. Its been so bad here I have only been out a few time since the AP140 got here.
Let hope for good weather.