Yellow!

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Cyclops
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Joined: Sat Aug 05, 2006 5:18 pm
Location: North East of England
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Yellow!

Post by Cyclops »

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!


Image
Canon 5D and 30D | Canon IXUS 265HS | Cosina 100mm f3.5 macro | EF 75-300 f4.5-5.6 USM III | EF 50 f1.8 II | Slik 88 tripod | Apex Practicioner monocular microscope

beetleman
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Joined: Fri Aug 04, 2006 4:19 am
Location: Southern New Hampshire USA

Post by beetleman »

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 :wink: )....My Dandelions are buried under 4" of heavy snow :(
Take Nothing but Pictures--Leave Nothing but Footprints.
Doug Breda

Cyclops
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Location: North East of England
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Post by Cyclops »

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?
Canon 5D and 30D | Canon IXUS 265HS | Cosina 100mm f3.5 macro | EF 75-300 f4.5-5.6 USM III | EF 50 f1.8 II | Slik 88 tripod | Apex Practicioner monocular microscope

MacroLuv
Posts: 1964
Joined: Mon Aug 28, 2006 2:36 pm
Location: Croatia

Post by MacroLuv »

Nice, Larry. :D
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. 8) 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. :lol:
(+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.
The meaning of beauty is in sharing with others.

P.S.
Noticing of my "a" and "the" and other grammar
errors are welcome. :D

Cyclops
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Joined: Sat Aug 05, 2006 5:18 pm
Location: North East of England
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Post by Cyclops »

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!
Canon 5D and 30D | Canon IXUS 265HS | Cosina 100mm f3.5 macro | EF 75-300 f4.5-5.6 USM III | EF 50 f1.8 II | Slik 88 tripod | Apex Practicioner monocular microscope

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