All Forum Comments
Comment by johnha posted on Scanning Negatives at 29/03/2012 - 23:54
Remember to take your camera with you when you start working. You'll be the first to be able photograph the thing's you'll be building.
Comment by johnha posted on Hi there ! French touch is comming :) at 29/03/2012 - 22:32
"By reducing light loss due to reflection to an absolute minimum, a Super-Multi-Coated standard lens actually transmits almost 20% more light than a conventionally coated model. Moreover, in lenses composed of more elements, the gain in effective lens speed increases. For example, increase of transmission through a lens of 12 elements may soar to 50% over that of a similar lens which has conventional coating."
For those looking for a long zoom, how about the M 135-600 f/6.7?
Comment by johnha posted on Not many people know this... at 29/03/2012 - 22:20
Comment by johnha posted on LCD screen protectors at 29/03/2012 - 21:59
If it is a Kr with the Ricoh pin, this link shows how to remove the pin (takes five minutes). Some are held in by a sprung plate rather than the screw mentioned on this site.
Comment by johnha posted on KR Lens... at 29/03/2012 - 21:51
If anybody would like to buy it, let me know
Comment by johnha posted on K5 questions at 29/03/2012 - 15:44
Comment by johnha posted on Ladybirds, spiders and bee fly at 29/03/2012 - 01:26
Comment by johnha posted on what would you take to travel light at 29/03/2012 - 00:10
Comment by johnha posted on First outing with the 67ii at 28/03/2012 - 23:48
Yes I saw the line of telescopes, but from the scale, these are unlikely to be longer than 1200mm focal length. Their images are shot at a much higher magnification than mine with the 500 x3 TC. So instead of using the 'scope as a 1200mm f/8 mirror lens they must be using eyepiece projection (getting magnified image in the 'scope eyepiece and photographing that through a camera & lens combination).
As I undestand it, this is where you set the camera lens focus to infinity and get the camera-eyepice distance just right.
This is one of my attempts with my old EI-2000 (which has a fixed zoom lens) through my 4.5" Newtonian 'scope, (which is 900mm f/8 optically) :

Comment by johnha posted on Cruising airliners and experiments with teleconvertors at 28/03/2012 - 11:51


If it is a lot, I'd be tempted to get a light box big enough to put several strips on and photo them to get an idea of which ones to scan. It takes a while to scan and categorise each one.
I can't help with scanners (I have a very old JS21 which will now be completely out of date), but you need to check it can do negatives an can compensate for the base colour of the film (usually orange-ish).