Quote:
Originally Posted by Mark Tulley  Thanks for the help. I apologise for not searching and finding the other thread on macro lenses which has reappeared today.
It seems that a fixed focal length is best, giving 1:1. I thought 1:3 quoted for the zoom lenses was better magnification, but the thread implies that it is only one third of the gain, not three times the gain.
I will probably look out for a second hand 105 fixed FL macro. Sigma, Tamron or Canon should all be ok by the sound of it.
Hope to post some results when I get it all together.
Mark |
the ratio figures are by proportion to life size - ie with a 1:1 lens a subject measuring 1cm will be 1cm on the negative - with a 1:2 it will be half life size - with a 1:4 it will be quarter life size etc
focal length (ie 90mm , 105,150,180 etc) generally effects the distance between the lens and subject at which 1:1 reproduction occurs which is why longer lenses are better for insects and other easily scared subjects
for wildflowers a 90 or 105 will be fine , and as macro lenses are generally max apperture f2.8 you can always add a teleconverter if you need more lenth occasionally