View Single Post
  #5  
Old 08-08-2012, 08:14 PM
mental4astro's Avatar
mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,004
Hey Mitch,

Remember what I said, the Moon IS bright at low power. At high power, the amount of actual Moon you'll be seeing is reduced, and with a proportional reduction in glare. I too get blinded by the Moon, but really only at low power. Have a look at the sketches I do of the Moon. These are all at high power on the most part. The couple I have done of the full Moon did need the use of filters, in which case I used a pair of polarising filters that allow me to regulate how much the image is toned down. I post my sketches here in IIS in the Observational and Visual forum's "sketch the moon night" sticky thread. Have a look. Hopefully it'll inspire you to pick up a pencil and paper too, .

The Hyperions can be altered with the use of tuning rings. But these signifcantly alter the focal plane of the eyepiece, so unless you are using a Mak or SCT, your scope won't have enough travel in its focuser to make use of this unique feature. As an example I can only use these rings with my big dob only by piggybacking a couple of extension tubes infront of the EP, which adversly affects the balance of my scope, . The rings do work, just not practical with my dob.

The term "barlow" on the Hyperions isn't quite right. The lens they use is another design, whose name just escapes me. Only the 24mm doesn't make use of the extra removeable field lens. Removing the field lens does alter the focal length of the EP. However, the ability to use the altered lens depends on the optical design of your scope, and varies from EP to EP. Only trial and error will tell you if the altered EP matches your scope. I can't help as I don't have a scope like yours. By the same token, I don't see the point of altering my EPs as the range I have serves me fine like they are.

These Hyperions can also be used for afocal photography by using an adapter that threads over the eyelens and then couples to your camera. They really are modular.

Mental.
Reply With Quote