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leon
22-12-2006, 03:38 PM
Hi all.

When reading about web cam imaging i hear a lot about the user, using a 5 x power mate, now what is that if i may ask. :help:

Not to sound to dumb, i presume it is some sort of Barlow, am i close. :P

Cheers leon :thumbsup:

sheeny
22-12-2006, 03:51 PM
Very close, Leon!;) A TeleVue Powermate does basically the same job as a barlow, but a Powermate is optically a little more complex and does a very high quality job. Powermates are available in 2.5x and 5x in 1 1.4", and 2x and 4x in 2".

Al.

leon
22-12-2006, 04:10 PM
Thanks Al, yes i was close. :D

Cheers Leon :thumbsup:

iceman
22-12-2006, 07:30 PM
The 5x powermate is great for image scale. It also has the effect that the more distance between the top of the powermate and the CCD focal plane, the more magnification you get (ie: you can get it up to a 6x or 7x powermate).

matt
22-12-2006, 07:33 PM
Mike

When you say focal plane, you're refering to the surface of the actual CCD chip... or camera film... or whatever light sensitive material you're using?

iceman
22-12-2006, 07:34 PM
Yes, Matt - whatever you're capturing the light onto. It may even be the focal point of an eyepiece if you had a desire to get really high magnification :P

matt
22-12-2006, 07:39 PM
That's called visual astronomy, right?:lol::rofl:

I remember doing that once... I think;)

davidpretorius
23-12-2006, 07:18 PM
my 25mm series 500 scrubs up nicely in the 5x powermate.

they are a weapon in the f5 scopes!

Dennis
23-12-2006, 07:49 PM
Hi Leon

I have an x5 Powermate and use it less than a handful of times each year on the C9.25 (F10 SCT). The last time I used it was to image the Trapezium (in Orion) a few weeks ago using the Celestron C9.25. It has also come in useful for imaging Sunspots in my Vixen 4 inch f9 refractor, on those rare days of good seeing, with the ToUcam.

The x2.5 Powermate does get a regular workout almost every imaging session, although sometimes, I wish it were x3 or x3.5 for when the seeing is very good.

Cheers

Dennis

leon
23-12-2006, 09:37 PM
Thanks Dennis, i get the idea of what you are saying.

Cheers Leon

davidpretorius
23-12-2006, 09:41 PM
hey leon, the 4x is very good as well, Matt has just bought one, but not cheap.

5x tends to be tooo big for the planets in f10's etc

leon
23-12-2006, 10:29 PM
Thanks for the info David.

Leon