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Focal reducers

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#1 skyguy88

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Posted 26 December 2007 - 02:13 AM

One of the most important elements in my system (C8, 0.3 focal reducer, Mallincam Color Hyper) is a 0.3 focal reducer that never leaves the camera. I gather that they come in several forms and at a wide range of prices. I'ld like to hear what others use.
I bought my FR from SAC along with a mintron camera several years ago. It includes a 0.5 reducer and a spacer tube to bring the combination to 0.3. The assembly screws into the filter threads on the camera nosepiece. I believe that the .5 reducer came from Mogg in Australia and SAC made the extender. I've used it with the mintron, the Mallincam and (I think), A DSI. The original cost was in the $60 range. Mogg appears to sell a similar product now (0.6/0.3) for about $80.
The reducer works wonders at concentrating light, making many objects fit into the FOV and making the job of the go-to much easier.
I haven't tested the FR, I've just used it so I can't vouch for it's optical quality. For my purpose, it works just fine. And it is appreciably less expensive than many alternatives.

Bill McDonald

#2 rshassell

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Posted 26 December 2007 - 11:40 AM

I have the MallinCam FR, which I bought with the camera. It works well enough. I use it for larger objects, but often go without it for smaller objects such as planetary nebulas. However, I got tired of removing and replacing it as I looked at different objects. Recently I purchased a Denkmeier Power Switch, to make switching between different magnifications more convenient.

#3 midway199

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Posted 26 December 2007 - 01:34 PM

For my StellaCam 3 and NexStar11 combo, I got Meade's f/3.3 CCD focal reducer. It comes with extension tubes for vary the focal length for CCD cameras. I didn't know whether or not I'd need the extensions ahead of time, and figuring I'll be tinkering with CCD's at some point, I didn't mind having them as options. Turns out, I didn't need the extensions and stars come to focus just as nicely with the f/3.3 focal reducer on my SCT as they do with my Newtonians.

#4 Bob S.

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Posted 26 December 2007 - 03:34 PM

I have the MallinCam FR, which I bought with the camera. It works well enough. I use it for larger objects, but often go without it for smaller objects such as planetary nebulas. However, I got tired of removing and replacing it as I looked at different objects. Recently I purchased a Denkmeier Power Switch, to make switching between different magnifications more convenient.


You need to tell us how you attached the powerswitch? A picture would also be VERY helpful. Thanks, Bob

#5 rshassell

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Posted 26 December 2007 - 07:16 PM

You need to tell us how you attached the powerswitch? A picture would also be VERY helpful. Thanks, Bob

It mounts to the visual back like any other 2" diagonal. The slide bar barely clears the feathertouch focuser knob, which I hadn't thought about beforehand. :o
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#6 greg

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Posted 26 December 2007 - 07:23 PM

Very Clean Set Up...I LIKE It...I Want It... I Gotta Stop Spending Money...
Greg


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