All Forum Comments
Comment by johnriley posted on How do I know whan a Lens is a macro lens at 21/11/2010 - 10:38
It works for me and others should do what works for them.
Comment by johnriley posted on straight or processed? at 21/11/2010 - 10:30
Comment by johnriley posted on Gare Du Nord (concert) at 20/11/2010 - 23:07
We can do something with a clear conscience and a good heart, but somebody somewhere may decide to see something wrong with it, for whatever reason doesn't really matter.
It is disturbing but it passes and the good heart remains in things, so don't lose faith Don!
Comment by johnriley posted on Profits from Purchases? at 20/11/2010 - 17:16
Comment by johnriley posted on Wooden tripod at 20/11/2010 - 14:28
Comment by johnriley posted on Wooden tripod at 20/11/2010 - 06:27
Comment by johnriley posted on Laptop with seperate monitor at 20/11/2010 - 06:25
Comment by johnriley posted on Profits from Purchases? at 19/11/2010 - 20:52
Comment by johnriley posted on I want a K5...NOW!! at 19/11/2010 - 17:48
For the Gallery I usually resize as per EPZ (1000 pixels wide at 72ppi)and file sizes are very modest - 200 to 400K usually. It's enough for a web image!
For the forum, 800 pixels wide and 200K is enough.
Comment by johnriley posted on Weekly Competition #175 - A Treasure at 19/11/2010 - 17:04
Has it got any of the following stamped on it
N/AI or OM or MD, 1.1, (at least 1.1, better than 1.1 improves, I.E. 2.1/5.1
Macrolenses are expected have at least a 1:1 ratio between the image produced and the subject's size. More expensive macro lens can have greater magnifications, such as 5:1, which means the image in the picture will be five times larger than it is in real life.
The older pentax macro lenses (50mm or 100mm) are usually f4 lenses with a maximum magnification of 1:2 (half life size) and a special extension ring increases that to 1:1
Later macro lense (A, F, FA, D-FA)are usually f2.8 and focus right down to 1:1