All Forum Comments
Comment by Algernon posted on Using ext tubes at 29/08/2018 - 13:26
On second thoughts using the 1/f rule anything up to 200mm would be sharp at 1/200th so no need to test. Improvement would be minimal and you shouldn't get any shake.
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Comment by Algernon posted on Using ext tubes at 29/08/2018 - 12:20
SR won't make any difference at 1/200th and 1/320th sec. It's around 1/25th sec. that it works best.
If you can get 1/200th only tests will tell if it's providing any benefit.
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If you can get 1/200th only tests will tell if it's providing any benefit.
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Comment by Algernon posted on Using ext tubes at 29/08/2018 - 12:11
The best way is to try it. Take a few shots with say 50mm, 75mm, 100mm etc. set in the camera at shutter speeds where blur is likely. See which setting provides the most keepers.
It's probably related more to magnification than actual length. Similar to Electronic First Shutter Curtain or EFSC which is worse at high magnifications.
http://www.robertotoole.com/blog/2014/01/28/electronic-first-shutter-curtain
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It's probably related more to magnification than actual length. Similar to Electronic First Shutter Curtain or EFSC which is worse at high magnifications.
http://www.robertotoole.com/blog/2014/01/28/electronic-first-shutter-curtain
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Comment by Algernon posted on Using ext tubes at 29/08/2018 - 10:26
You can get closer than 20 feet from grebes with an electric boat as Daniel did in this post....
https://www.pentaxuser.com/forum/topic/norfolk-holiday---wildlife-11284/p-0
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https://www.pentaxuser.com/forum/topic/norfolk-holiday---wildlife-11284/p-0
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Comment by Algernon posted on Photography and kayaking at 22/08/2018 - 11:05
Is No: 7 a selfie
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Comment by Algernon posted on Fun at The Fringe at 18/08/2018 - 17:30
These have 841mm x 20M but it's probably close to £30 posted...
https://www.penninedrawing.co.uk/search.html?search%5Bkeywords%5D=tracing+paper&...
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https://www.penninedrawing.co.uk/search.html?search%5Bkeywords%5D=tracing+paper&...
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Comment by Algernon posted on Dressmaker Tracing Paper or alernative at 12/08/2018 - 15:13
Cheaper to buy off the peg dresses these days Stan, I do!
Loads of places sell tracing paper..... drawing office supplies, Amazon, Ebay etc.
I think the Queen buys hers from here
https://www.morplan.com/shop/en/morplan/tracing-paper
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Loads of places sell tracing paper..... drawing office supplies, Amazon, Ebay etc.
I think the Queen buys hers from here
https://www.morplan.com/shop/en/morplan/tracing-paper
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Comment by Algernon posted on Dressmaker Tracing Paper or alernative at 12/08/2018 - 11:29
On second thoughts using the 1/f rule anything up to 200mm would be sharp at 1/200th so no need to test. Improvement would be minimal and you shouldn't get any shake.
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In all the testing I've seen they alter the FL of the lens so that they can compare different formats so 200mm APS-C would be recorded as a 133mm/130mm
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