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limecity
10-10-2007, 01:06 AM
A very curious question.

whats the difference between 1:1 and 1:2
I went through google search and all the explanations give very detail essay which I don't understand.

which one is better? 1:1 or 1:2 ?
or 2:1 if there is any.
ShaolinTiger
10-10-2007, 01:21 AM
1:1 means real macro, it's the ratio of reproduction size on your sensor.

So if the thing is 5mm long, it will take up 5mm of your sensor.

If it's 1:2 it means it's half the size, so it's not true macro - it means the 5mm will take up 2.5mm on your sensor.

The other way round is rare, usually only found on MPE-65 which goes up to 5:1 meaning that 5mm will take up 25mm on your sensor.
limecity
10-10-2007, 01:30 AM
oh okay now i know.
so I shud get a 1:1 macro lens instead of 1:2 ? :-D

hmm i wonder how will Raynox DCR250 apply on a 1:2 macro lens
ShaolinTiger
10-10-2007, 01:32 AM
oh okay now i know.
so I shud get a 1:1 macro lens instead of 1:2 ? :-D

Yes, 1:2 isn't even macro, it's just quite close.

hmm i wonder how will Raynox DCR250 apply on a 1:2 macro lens

It'll make it 1:1 or close enough.
RambuTan
10-11-2007, 04:59 PM
Yes, 1:2 isn't even macro, it's just quite close.

It'll make it 1:1 or close enough.

Btw, i was trying SP90 + DCR250 on Nikon D40, it doesn;t seem working. Anyone there trying the same method as mine & it works?

Pls help!!

rgds,
limecity
10-11-2007, 05:03 PM
what do you mean by its not working?

I don't think SP90 works on D40.
ShaolinTiger
10-11-2007, 05:14 PM
It wont auto-focus, but it should work fine in manual.
RambuTan
10-11-2007, 05:24 PM
what do you mean by its not working?

I don't think SP90 works on D40.

Sorry for confusing u guy... It is OK now as i have to go very very near to object & manually focus.

Hehehehe...pls excuse me as newbie here.

rgds,
mki88
11-04-2007, 12:03 AM
Sorry for confusing u guy... It is OK now as i have to go very very near to object & manually focus.

Hehehehe...pls excuse me as newbie here.

rgds,


It will be depending on your object. If your object is insect, definately it will run away. If it is flower, it wouln't be much of a problem.

Also, what do u mean by 'very very near'? 1cm macro? If it is so, careful with the lighting as the camera sticking too near to the object may have blocked some light and create shadow on the object.
Crazymalaysian
11-04-2007, 07:43 AM
It will be depending on your object. If your object is insect, definately it will run away. If it is flower, it wouln't be much of a problem.

Also, what do u mean by 'very very near'? 1cm macro? If it is so, careful with the lighting as the camera sticking too near to the object may have blocked some light and create shadow on the object.

Not necessarily. :)

I shoot all my bugs with less than 10cm working distance, and I manage.

Btw ST by law of ratios, 1:2 = 0.5:1. Tamron sells their non-true-macro lenses as 1:2 I believe.