Telescope Eyepiece 1.25″ 32mm Superior Plossl Fmc Lens
Tuesday, February 23rd, 2010 at
12:45 pm
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TELESCOPE EYEPIECE 1.25" 32MM SUPERIOR PLOSSL FMC LENS
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US $34.95 End Date: Thursday Feb-25-2010 19:06:51 PST Buy It Now for only: US $34.95 Buy it now | Add to watch list |
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I wouldn't go for a Plossl at all at that kind of focal length. The eye relief on Plossls is limited to about 2/3rds of the focal length – this is a fundamental limitation of the optical design regardless of the quality. If the eye relief gets too low they become very uncomfortable to use and in this case 5mm is likely shorter than your eyelashes making things even worse. You won't be aware of the problem with your 25mm Plossl since that will give you plenty of eye relief on account of its longer focal length. Personally I find Plossls fine down to about 15mm, slightly uncomfortable in the 12.5mm range and completely unusable under 10mm.
I would go for a different optical design. If money is an issue I would go for either a Baader Genuine Orthoscopic (for very high contrast and good colour correction) or a Celestron X-Cel if you want a slightly wider field of view. Either of these will cost a bit more than the equivalent Plossl but are still not silly money and likely to prove better value in the long run simply because they are more likely to get used in practice.
I think a 300 X 125 banner might be good.. I wanna put it on the right side underneath the video of the week.
If you are in the U.S. and west of the Mississippi, you might be able to see it with a telescope of at least 10" of aperture. NASA TV will be doing a live feed and most certainly have video clips after the event.
As for size of the debris cloud after the impact, its going to be be small, maybe 20 – 30 miles on a side (don't forget, the moon is about 250,000 miles away). The crater it'll impact is something like 50 miles in diameter, but since its near the moon's south pole, its profile is going to be foreshortened.
There are several issues to be taken into account when using older lenses on a new digital SLR. First is that you will lose the autofocus and/or auto aperture features of your camera, also you will have to take into account the size difference between the CMOS sensor in your camera and a 35 mm frame. The sensor being smaller will mean that you will have to make some calculations as to what the actual zoom on a given lens will be. For example if you have a 55mm lens for a 35mm camera, it will actually function as a ~ 82.5mm lens (you would use the actual mm rating and multiply it by 1.5).
Las 125 medidas de la patronal para reducir las cargas administrativas: CEOE y Cepyme ha propuesto al Gobierno ado…
1) make sure your collimation is spot on. Use something like the Orion collimating eyepiece, not a laser.
2) The optimum focal length for the planets with your 10" scope is around 5mm (250x).
3) None of your Plössls are top quality. Vixen and Hyperion are much better. I also like Orion's Edge-On Planetary eyepieces.
4) Forget the 80mm for planetary observing — it's too small.
5) Be patient and train your eye to tease out fine low-contrast detail. It's there; you just can't see it yet. Sketching the planets is a great way to train your eye.
Dear Mr. [or Ms.] HisLastName.
I got that mad at a game..last level in Mario Sunshine, you have to steer that god damn boat on the lava, and you have to steer with the flood pack.God I fucking destroyed that controller.
lol i'm making a telescope
iPhone Camera + Telescope = Great Moon Pictures?: These are photos taken hand held with an iPhone held over …
A microscope without an eyepiece is still a microscope Call it the digital microscope
class till 125 then a lil break
There's several places where this shows up, some are more in keeping with your theme than others.
Right at the start, the robots end up lost in that giant desert, with a skeleton of a giant snake behind them. The robots continue to have trouble with sand and the elements. Even with technology, farming that world is obviously a hard life.
Obi Wan remarks that the old technology of a sword is more accurate that the modern 'random' blasters.
In the Death Star, a wild animal has taken up residence in the garbage dumps.
The humanity of Han Solo pretty much trumps the mechanical looking and acting stormtroopers every time.
When they are preparing to attack the Death Star, one of the pilots remarks that it would be impossible to attack the exhaust vent, and Luke counters that it will be 'just like shooting [somethingorothers] in the canyons back home.'
Obi Wan even triumphs over death itself and comes back to advise Luke at the climax of the movie.
And, of course, Luke turns off his targeting computer to go with the flow of the force.
"You think your relationship is so superior to everybody else, but the truth is it's not. You will break up, god, stop being unrealistic. "
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