The mirror is f/7 and the EFL is f/6.8 with 2 lenses. It's working good tonight but I've already decided to redo the lower box to make it easier to use. The...
hi is the lens before the secondary? also could part of a 20in f 5.25 be used to make a CHIEF? it works good onaxis// just wondering/ thanks for shareing your ...
... No the secondary is before the lenses, it's just like the layout of the 4 inch in my files only bigger. A 20 inch f/5.25 is too fast to be made into a...
hi ed how do the images compare in your 12 in onaxis to offaxis? also is the columation much harder.i have a 12 in f7.2 that needs finished corecting would...
Kevin, I'll post a spot diagram of the 12 inch CHief and the same mirror as a Newtonian. The only difference is that there a little lateral color from the...
hi ed would fluorite glass be better than bk7 for chief corrector i may have a piece 5 3/4 in by 1 7/8 in just wondering? also i have a piece of flint index of...
... Kevin, I've let Zemax do some glass substitutions on the CHief and it really doesn't do much until you get under F/6 and fluorite glass I think had some...
thanks the heavy flint i was hoping for a refractor it ta 9.25in by 1 5/8 thick i have plans for a 8 in but it uses a diferent flint ... From: Ed Jones...
hi thanks for ihe info can you use a secondary that is round or square insted of a normal secondary i see the surplushed has a lot of flats that are round and...
Kevin, You can uses either round or square as long as they are flat. You might want to bevel one edge back 12 degrees to avoid vignetting. Also the tilt angle...
Hello, This weekend at Stellafane I had an opportunity to take a close look at Ed Jones' 12" f7 CHiefspeigler (hope I have the specs correct) and also to get...
Hi Gary, I had a lot of interest in my scope, a lot of folks had no idea of how it worked. I didn't see the point of entering it into their competition, I...
Hi Ed, We're glad you brought it. It must be something on the moon too. I wonder how many unobstructed reflectors there are in the whole country? I think my...
Hi Gary, <I wonder how many unobstructed reflectors there are in the whole ... it's because all other designs require you to make the mirrors. The CHief uses...
John, If you use equi-radius lenses it will have some axial color. I can show you what you'll get, maybe it's not so bad. If not you could modify one lens or...
Hey Ed, This is going to be a dedicated lunar scope, so color is anathema to what I want. I will write to you on the back channel to get some idea of costs,...
Hi Ed, Wanted to offer congratulations on what I believe to be the next big thing in amateur astonomy. Many Kudos. I am not a glass pusher but enjoyed Garys...
Thanks Mark! The CHief came apart with I think two or three bolts, all in the same area. Looked easy enough to do single-handedly and the two pieces aren't...
Thanks Mark, I think the CHief will draw a lot of interest once people learn about it and realize it's not that difficult. You don't have to be a glass pusher...
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