Close up filter

[dxsibo]

is there any better grade close up filter? am using a +4 cheapo filter to try try...and notice it got some CA.

 

[Snoweagle]

is there any better grade close up filter? am using a +4 cheapo filter to try try...and notice it got some CA.

Best is the +10. But prepare to pay premium for it.

 

[giantcanopy]

U pay more for better close up filters. It is not just a matter of getting a +10 is better than getting a +4 etc. Cheap single element ones can significantly degrade the IQ especially at the corners. Those with dual elements or more / special coatings give better IQ.


Examples include the Canon 500D, their 250D, the ( discontinued ) Nikon T series, zoerk makes a high quality +12 filter.

Ryan

 

[has91]

what does the +(insert number) mean? how to make it 1:1 using the close up filters?

 

[Snoweagle]

what does the +(insert number) mean? how to make it 1:1 using the close up filters?

That's the dioptric magnification.

 

[giantcanopy]

You get the focal Length of lens divided by focal length of close up filter to get magnification
( focal length of the diopter is 1000 / diopter (+) )

Hence a 50mm lens with a +10 dioptre gives
50mm / ( 1000 divide 10 ) = 50% magnification

Different lenses give different reproduction ratios.
U stack a 2+ with a 105mm macro lens, and u can go past 1:1,
but u stack a 2+ with a non macro 105mm with low reproduction ratio, u might not even reach 1:1

To gain 1:1 for any particular lens u will have to find out and do abit of calculation backwards ...

Ryan

 

[has91]

ok one last noob questions. lol. so 1:1 means 100% magnification?

 

[Snoweagle]

ok one last noob questions. lol. so 1:1 means 100% magnification?

1:1 means life-size.

 

[sanas]

close up is not macro.

so basically whats the difference between these two lenses?
also the difference from telefoto lens.

thanks

 

[teebs]

so basically whats the difference between these two lenses?
also the difference from telefoto lens.

thanks

Any close up filter that is less than +10 diopter is known as a close up filter. Only +10 diopter and above filters are known as macro filters.