Yellow!

Cyclops · Post by **Cyclops** » Thu Apr 05, 2007 5:35 am

Spring is definitely here,the Dandelions are out in force!
The sun is out and its hot out there already!

Did you know that the word dandelion comes from the french 'Dente de leon' referring to the leaves which look like lion's teeth!

FZ7 with +4 close up lens.
Hard to see the screen if its sharp enough with the sun coming thru the curtains!

beetleman · Post by **beetleman** » Thu Apr 05, 2007 6:08 am

A very warm and sunny looking picture Cyclops, a sure sign of spring. One suggestion, you saw Sues flower post here http://www.photomacrography.net/forum/v ... php?t=2200
next time Try off centering the flower a little (I am going to try and remember to do that also with my pictures

)....My Dandelions are buried under 4" of heavy snow

Cyclops · Post by **Cyclops** » Thu Apr 05, 2007 6:56 am

Doug, this is as close as i can get with this camera so if i put it offf centre you''d see a lot of grass!

What dioptre rating is your 250D close up lens?

MacroLuv · Post by **MacroLuv** » Thu Apr 05, 2007 9:47 am

Nice, Larry.

If I can answer your question, 250D is +4 diopter (1000/250 = 4). "D" means it has two achromatic elements to correct chromatic aberrations. That means of course higher quality, weight and price.

So, for example, with 100mm lens and +4 you can gain +0.4× magnification more (100/250 = 0.4). With +10 and 100mm lens calculation gives +1× magnification but with more troubles.

(+10 ---> 1000/100 = 10; and 100mm (lens)/100 (+10 diopter) = 1× magnification)
You can easily figure out how diopters have more impact on longer focal lens. In contrary, extension tubes (macro rings) have more inpact on shorter focal lens.

Cyclops · Post by **Cyclops** » Thu Apr 05, 2007 6:34 pm

Thanks Niklas and tho i do have a knowledge of how macro works i just didn't realise that 250 = +4 dioptre. Well in that case my close up lens is the same as Doug's as mine is a +4! Doug manages to get a lot closer than me tho,his lens must be a lot closer focusing than mine. Either that or I just need to play with it more!