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#1
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more moon attempts
Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm
getting pretty good results: http://edgehill.net/Misc/moon/pg1pc2 http://edgehill.net/Misc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. |
#2
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more moon attempts
Pudentame wrote:
Paul Furman wrote: Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results: http://edgehill.net/Misc/moon/pg1pc2 http://edgehill.net/Misc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. The second is definitely softer, not as sharp. The stacked converters may be contributing to that loss of sharpness. I'm pretty sure it's the viewing conditions and maybe different sharpening, ISO & exposure. TCs make a less sharp image uncropped but in terms of actual magnified image detail on the subject, they do get you more, I've done a bunch of tests of this. I added a full pixel crop, here's the two for comparison although it's not very meaningful: http://edgehill.net/1/Misc/moon/2008...4215+2_f11.jpg http://edgehill.net/1/Misc/moon/2008...p/_PBF4366.jpg The second is 1.4x more magnified. The first one was also taken before I corrected an infinity focus problem with the lens but neither is anywhere close to the sharpness of a closer subject without atmospheric disturbance nor do they begin to utilize all those pixels at full size. Here's some shots of flowers about 50 feet away (ignore middle one): http://edgehill.net/Misc/misc-photos/3-2-08-magnolia full pixel crops: http://edgehill.net/1/Misc/misc-phot...p/_PBF4285.jpg http://edgehill.net/1/Misc/misc-phot...p/_PBF4295.jpg |
#3
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more moon attempts
On Mar 3, 1:26 pm, Paul Furman wrote:
Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results:http://edgehill.net/Misc/moon/pg1pc2...sc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. But a small apo telescope? Seriously, you did a very good job with a lens and T/C. Check out this one done by a guy on that group with a 500mm f8 apo telescope costing about $500.00. http://forums.dpreview.com/forums/re...&q=moon&qf =m |
#4
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more moon attempts
"Paul Furman" wrote in message t... Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results: http://edgehill.net/Misc/moon/pg1pc2 http://edgehill.net/Misc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. I would be proud of any of those photos, they are awesome! Blah |
#5
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more moon attempts
"RichA" wrote in message ... On Mar 3, 1:26 pm, Paul Furman wrote: Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results:http://edgehill.net/Misc/moon/pg1pc2...sc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. But a small apo telescope? Seriously, you did a very good job with a lens and T/C. Check out this one done by a guy on that group with a 500mm f8 apo telescope costing about $500.00. http://forums.dpreview.com/forums/re...&q=moon&qf =m How do you mount a camera to a telescope ? |
#6
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more moon attempts
"XxYyZz" wrote in message ... "RichA" wrote in message ... On Mar 3, 1:26 pm, Paul Furman wrote: Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results:http://edgehill.net/Misc/moon/pg1pc2...sc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. But a small apo telescope? Seriously, you did a very good job with a lens and T/C. Check out this one done by a guy on that group with a 500mm f8 apo telescope costing about $500.00. http://forums.dpreview.com/forums/re...&q=moon&qf =m How do you mount a camera to a telescope ? Micahel Covington's book, Astrophotography for Amateurs, described numerous was to do this task. Jim |
#7
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more moon attempts
"XxYyZz" wrote in message ... "RichA" wrote in message ... On Mar 3, 1:26 pm, Paul Furman wrote: Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results:http://edgehill.net/Misc/moon/pg1pc2...sc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. But a small apo telescope? Seriously, you did a very good job with a lens and T/C. Check out this one done by a guy on that group with a 500mm f8 apo telescope costing about $500.00. http://forums.dpreview.com/forums/re...&q=moon&qf =m How do you mount a camera to a telescope ? For my telescope, I just bought an adapter for the scope, and a matching one for the camera. Slid them together, tighten a couple of screws, and -- presto -- it's mounted. Good Luck, Dudley |
#8
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more moon attempts
"Jim" wrote in message . net... "XxYyZz" wrote in message ... "RichA" wrote in message ... On Mar 3, 1:26 pm, Paul Furman wrote: Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results:http://edgehill.net/Misc/moon/pg1pc2...sc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. But a small apo telescope? Seriously, you did a very good job with a lens and T/C. Check out this one done by a guy on that group with a 500mm f8 apo telescope costing about $500.00. http://forums.dpreview.com/forums/re...&q=moon&qf =m How do you mount a camera to a telescope ? Micahel Covington's book, Astrophotography for Amateurs, described numerous was to do this task. Jim Thanks for the info. |
#9
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more moon attempts
"Dudley Hanks" wrote in message news:qVhzj.74697$C61.74494@edtnps89... "XxYyZz" wrote in message ... "RichA" wrote in message ... On Mar 3, 1:26 pm, Paul Furman wrote: Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results:http://edgehill.net/Misc/moon/pg1pc2...sc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. But a small apo telescope? Seriously, you did a very good job with a lens and T/C. Check out this one done by a guy on that group with a 500mm f8 apo telescope costing about $500.00. http://forums.dpreview.com/forums/re...&q=moon&qf =m How do you mount a camera to a telescope ? For my telescope, I just bought an adapter for the scope, and a matching one for the camera. Slid them together, tighten a couple of screws, and -- presto -- it's mounted. Good Luck, Dudley Thanks, that sounds easy enough. |
#10
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more moon attempts
"XxYyZz" wrote in message ... "Dudley Hanks" wrote in message news:qVhzj.74697$C61.74494@edtnps89... "XxYyZz" wrote in message ... "RichA" wrote in message ... On Mar 3, 1:26 pm, Paul Furman wrote: Playing with the new (old) 500mm f/4.5 lens & teleconverters I think I'm getting pretty good results:http://edgehill.net/Misc/moon/pg1pc2...sc/moon/pg2pc8 The second one I calculated the actual f/stop to be f/112 at 1400mm where it reads f/14 on the ring. The first read f/11 on the ring at 1000mm. Both are 1/4 second which is probably a bit slow but close. On the second one you can click the pic for a full pixel crop but it doesn't have any extra detail if I scale up the 1/3 size final & overlay them. The converters do increase detail though. The second one was not as good viewing conditions I think. The first is only the 2x converter but probably a little more detail just because of the conditions. Advice for improvements welcome. But a small apo telescope? Seriously, you did a very good job with a lens and T/C. Check out this one done by a guy on that group with a 500mm f8 apo telescope costing about $500.00. http://forums.dpreview.com/forums/re...&q=moon&qf =m How do you mount a camera to a telescope ? For my telescope, I just bought an adapter for the scope, and a matching one for the camera. Slid them together, tighten a couple of screws, and -- presto -- it's mounted. Good Luck, Dudley Thanks, that sounds easy enough. Most bigger scopes will use a T mount. |
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