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Search took 0.00 seconds. Search: Posts Made By: John in Santa Cruz
Forum: General Escape 03-22-2021, 09:41 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
ah, hah.

ah, hah.
Forum: General Escape 03-22-2021, 09:17 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
if you scroll far enough down, there's a picture...

if you scroll far enough down, there's a picture of his rig.... says what all he has there.
Forum: General Escape 02-06-2021, 01:39 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
yeah, C14's are beasts to setup in the field,...

yeah, C14's are beasts to setup in the field, totally impractical for a single evenings star party. I helped retrieve a donated Meade LX200 14", it took two of us to get it off the tripod and onto...
Forum: General Escape 02-06-2021, 01:22 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
a 'dobson' or dobsonian is a Newtonian Reflector...

a 'dobson' or dobsonian is a Newtonian Reflector telescope, on a very simple alt-azimunth mount, something like a cannon.

here's the 8" Orion XT8 Classic,...
Forum: General Escape 02-06-2021, 01:08 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
thats going to be trickier, these dobsons we're...

thats going to be trickier, these dobsons we're talking about are a little too large for the trailer. For visual use, small aperture scopes are mostly useful for the moon and planets.

the thing...
Forum: General Escape 02-05-2021, 10:35 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
I think they multiply in the dark. ...

I think they multiply in the dark.

https://photos.smugmug.com/photos/i-f2DQQJr/0/05ef36a3/X2/i-f2DQQJr-X2.jpg


The Orion's come with a simple peep-sight collimation tool, which works...
Forum: General Escape 02-05-2021, 09:27 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
I would add two eyepieces, maybe a 15 and 9mm...

I would add two eyepieces, maybe a 15 and 9mm plossl, about $30 each, and get SkySafari Plus on my smartphone or tablet to use as a star chart in the field, and eventually I'd add a Telrad finder,...
Forum: General Escape 02-05-2021, 09:15 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
I'd suggest an 8" Orion Classic ... that extra 2"...

I'd suggest an 8" Orion Classic ... that extra 2" of aperture over the 6" brings you nearly double the light gathering power, and makes for much better views of the 'dim fuzzies' that most deep space...
Forum: General Escape 08-10-2020, 12:26 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
yeah, every article on that site is by one RAHUL...

yeah, every article on that site is by one RAHUL NAMASUDRA, and near as I can tell its New Dehli based.
Forum: General Escape 02-29-2020, 01:54 AM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
a guy in my Astronomy club is a recently retired...

a guy in my Astronomy club is a recently retired physicist, worked at SLAC for many years. has some great stories about the "Klystron gallery" with those 2 story tall vacuum tubes that power SLAC.
Forum: General Escape 02-28-2020, 06:50 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
one of the lead LSST project designers came and...

one of the lead LSST project designers came and gave a talk to my astronomy club a couple years ago, went into quite a lot of detail on the camera design and construction. very cool stuff.
Forum: General Escape 02-28-2020, 04:33 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
I thought U of Arizona did the mirror for the...

I thought U of Arizona did the mirror for the LSST ?

here's the dual mirror being polished... note there's two different curves in one piece of glass. Mirror "M1" is the outer half of the...
Forum: General Escape 02-28-2020, 05:30 AM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
otoh, it seems like there's plenty of Hawaiian's...

otoh, it seems like there's plenty of Hawaiian's who are /for/ the TMT project...

Documents - Maunakea & TMT (https://www.maunakeaandtmt.org/get-the-facts/documents/)
Forum: General Escape 02-27-2020, 05:23 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
If the 'natives' got their way according to their...

If the 'natives' got their way according to their rants, white man would leave the island, remove Waikiki etc, and stop all air and sea travel except by dugout.

IMHO, that would be funny if it...
Forum: General Escape 02-27-2020, 01:32 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
indeed, due to the political issues, the TMT is...

indeed, due to the political issues, the TMT is taking even longer.... Planning for the TMT started in 2000, its 2020 and they are still stalled by ongoing protests, it should have been fully...
Forum: General Escape 02-26-2020, 01:00 AM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
its more like 2.5-3 hours after sunset. 90...

its more like 2.5-3 hours after sunset. 90 minutes after sunset is about when it finally gets properly dark at our middle temperate latitudes. Low Earth orbit satellites are visible for about...
Forum: General Escape 02-25-2020, 12:49 AM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
airplanes usually blink, so their trails look...

airplanes usually blink, so their trails look dashed.

that could be a satellite or a meteorite. The ISS (Space Station) in particular can be very bright in the hour or so after full darkness...
Forum: General Escape 02-19-2020, 03:47 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
Its not that big.. EOS 60D EF18-200 kit...

Its not that big..

EOS 60D
EF18-200 kit zoom
EF20mm f/2.8 USM
EF85 f/1.8 USM
EOS M
EF-M 22mm f/2 'pancake'
420EX strobe
EF lens adapter for the M (hardly ever used)
Forum: General Escape 02-19-2020, 03:43 PM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
I got the short FL eyepieces when I was using the...

I got the short FL eyepieces when I was using the 10" f/4.5 Coulter. On that scope, the 4.7 is 244X and 20 arcmins...

my eyeglasses correct my astigmatism very nicely as long as the exit pupil is...
Forum: General Escape 02-19-2020, 11:38 AM
Replies: 97
Views: 7,801
Posted By John in Santa Cruz
My choice of eyepiece focal length is pretty...

My choice of eyepiece focal length is pretty heavily based on the focal length and f/ratio of the telescope. I use the 18mm as my main eyepiece with my 20" f/5 Obsession, which has a 2540mm focal...
Showing results 1 to 20 of 20

 
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