75-300 IS USM with reverse mount 18-55?

twinkle_2k86 · 26th of July 2012 (Thu)

Just getting into reverse mounting lens for macro shooting.

I have a 75-300 IS USM lens and was wondering if i reverse fitted the kit lens (18-55) would it work? the 75-300 len has a min focus distance of 1.5M.

Would the bonus of the IS help out?

I was going to buy a reverse adaptor so i can mount the kit lens straight to the body, but may buy a 58mm to 58mm adaptor as well if it may work with both lens together.

Any thoughts please

hayath · 26th of July 2012 (Thu)

The 18-55 is going to work as a diopter.
The math to calculate mag gained
Mag gained = BL_FL / ML_FL
In your case, reversing @ 55 mm onto the 70-300
@ 70mm, Mag gained = 70/55 -> >1:1
@300mm, Mag gained = 300/55 -> ~6:1

The lower the FL on the lens in front, the greater the magnification.

The 18-55 a f3.5 to f5.6 lens and you are going to get vignetting in all probability. The 50mm f1.8 would be a better bet IMHO.

Have fun shooting

hayath · 26th of July 2012 (Thu)

IS would be the least of your worries at those kind of magnifications

killwilly · 26th of July 2012 (Thu)

I've tried reversing my 18-55 on my 55-250, but have to say the results were quite poor.
However, the 18-55 revers mounted directly on to the camera is pretty acceptable.

I have found my best reverse mounted lenses are ,my Helios 58mm on the front of my Helios 135mm. Both are of course manual lenses.

twinkle_2k86 · 26th of July 2012 (Thu)

OK, might be a nightmare then. will stick to just the kit lens for now and practice with that.

I have plans on geting a 50mm 1.8 when i can find a mk1 version of the lens.

thanks for the reply

killwilly · 26th of July 2012 (Thu)

This a pic of a ballpoint pen taken with the two Helios lenses mentioned in my previous post. At least it will give you some idea of magnification.

2x Helios stacked by killwilly, on Flickr

twinkle_2k86 · 26th of July 2012 (Thu)

that is well magnified. Great shot that

killwilly · 26th of July 2012 (Thu)

Quote:

Originally Posted by twinkle_2k86

that is well magnified. Great shot that

Thank you

26th of July 2012 (Thu)	#1
twinkle_2k86 Member Join Date: Jul 2009 Location: Andover/ Salisbury uk Posts: 106 IMAGE EDITING OK	75-300 IS USM with reverse mount 18-55? Just getting into reverse mounting lens for macro shooting. I have a 75-300 IS USM lens and was wondering if i reverse fitted the kit lens (18-55) would it work? the 75-300 len has a min focus distance of 1.5M. Would the bonus of the IS help out? I was going to buy a reverse adaptor so i can mount the kit lens straight to the body, but may buy a 58mm to 58mm adaptor as well if it may work with both lens together. Any thoughts please __________________ Jon Harris Photography. Canon 40D ,Gripped, 50mm 1.8 II, 28-70 II f3.5-4.5, 75-300 IS USM, sigma ef-500 super dg, Manfotto 075 tripod, 029 head.

26th of July 2012 (Thu)	#2
hayath Senior Member Join Date: Jan 2010 Location: Bangalore, India Posts: 1,161 IMAGE EDITING OK	Re: 75-300 IS USM with reverse mount 18-55? The 18-55 is going to work as a diopter. The math to calculate mag gained Mag gained = BL_FL / ML_FL In your case, reversing @ 55 mm onto the 70-300 @ 70mm, Mag gained = 70/55 -> >1:1 @300mm, Mag gained = 300/55 -> ~6:1 The lower the FL on the lens in front, the greater the magnification. The 18-55 a f3.5 to f5.6 lens and you are going to get vignetting in all probability. The 50mm f1.8 would be a better bet IMHO. Have fun shooting __________________ Hayath Flickr \| Blog \| Picasa

26th of July 2012 (Thu)	#3
hayath Senior Member Join Date: Jan 2010 Location: Bangalore, India Posts: 1,161 IMAGE EDITING OK	Re: 75-300 IS USM with reverse mount 18-55? IS would be the least of your worries at those kind of magnifications __________________ Hayath Flickr \| Blog \| Picasa

26th of July 2012 (Thu)	#4
killwilly Member Join Date: Dec 2009 Location: Lincolnshire, UK. Posts: 509 IMAGE EDITING OK	Re: 75-300 IS USM with reverse mount 18-55? I've tried reversing my 18-55 on my 55-250, but have to say the results were quite poor. However, the 18-55 revers mounted directly on to the camera is pretty acceptable. I have found my best reverse mounted lenses are ,my Helios 58mm on the front of my Helios 135mm. Both are of course manual lenses. __________________ Alan. ---------------------- Canon 7D. Canon 15-85 EF-S Lens. Canon 55-250 EF-S Lens. Speedlite 430ex 11 Canon T90 SLR. + various FD lenses. Sigma APO 150-500mm F5-6.3 DG OS HSM - Bigmos.

26th of July 2012 (Thu)	#5
twinkle_2k86 Member Join Date: Jul 2009 Location: Andover/ Salisbury uk Posts: 106 IMAGE EDITING OK	Re: 75-300 IS USM with reverse mount 18-55? OK, might be a nightmare then. will stick to just the kit lens for now and practice with that. I have plans on geting a 50mm 1.8 when i can find a mk1 version of the lens. thanks for the reply __________________ Jon Harris Photography. Canon 40D ,Gripped, 50mm 1.8 II, 28-70 II f3.5-4.5, 75-300 IS USM, sigma ef-500 super dg, Manfotto 075 tripod, 029 head. Last edited by twinkle_2k86 : 26th of July 2012 (Thu) at 07:58.

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