What are the advantages/disadvantages of a Dall-Kirkham design scope vs a SCT?
Thanks
Dave
Thanks
Dave
Dall-Kirkham vs a SCT
Started by kagge, 11/08/2007 07:29PM
Posted 11/08/2007 07:29PM
Opening Post
Posted 11/13/2007 01:22AM
#1
Hi -- The folks who make D-K, e.g. Takahashi, produce excellent quality optics (compared to the major name brands). There is no corrector so cooldown can be a bit faster, though correspondingly the mirror can get dusty but no corrector to clean. No need for a dew shield on a D-K. Focal length typically a bit longer. Hope this helps -- Michael
Posted 11/13/2007 06:26AM
| Edited 11/13/2007 06:28AM
#2
Here is a brief comparison between an SCT225 and the Mewlon 250
http://www.cloudynights.com/item.php?item_id=543
I have never looked through a Mewlon 250, but can say the SCT225 is about everything a 9" SCT could hope to be !
The picture is from a side by side of a Celestron 9.25" and the SCT225.
http://www.cloudynights.com/item.php?item_id=543
I have never looked through a Mewlon 250, but can say the SCT225 is about everything a 9" SCT could hope to be !
The picture is from a side by side of a Celestron 9.25" and the SCT225.
Attached Image:
David Simons
Funding Member
