testing reversed 35-70
May 17, 2013 16:58:00 #
this is a good older glass canon FD 35-70 1:3.5 lens
I did several hand held shots to try to find the 1:1 ratio
the sweet spot seems to be at about 45-50 if so as soon as I get the 55-52 filter to filter (M/M) ring I'll put my FD glass 50mm on
it is nice to be able to work with so many lens now.
Are my thoughts close on these ratio numbers.
Harvey
I did several hand held shots to try to find the 1:1 ratio
the sweet spot seems to be at about 45-50 if so as soon as I get the 55-52 filter to filter (M/M) ring I'll put my FD glass 50mm on
it is nice to be able to work with so many lens now.
Are my thoughts close on these ratio numbers.
Harvey
2:1 ???
1:1 ???
1:2 ???
May 17, 2013 19:28:20 #
I notice that none are tack-sharp. I suspect the use of a zoom lens. Your Canon APS-C sensor is 22.2-mm wide.
Image #1 = 13.3-mm captured = 22.2/13.3 = 1.67:1 mag. = 1.67x life-size
Image #2 = 18.6-mm captured = 22.2/18.6 = 1.20:1 mag. = 1.2x life-size
Image #3 = 29.5-mm captured = 22.2/29.5 = 0.75:1 mag. = 1:1.33 mag = 3/4 life-size.
Image #1 = 13.3-mm captured = 22.2/13.3 = 1.67:1 mag. = 1.67x life-size
Image #2 = 18.6-mm captured = 22.2/18.6 = 1.20:1 mag. = 1.2x life-size
Image #3 = 29.5-mm captured = 22.2/29.5 = 0.75:1 mag. = 1:1.33 mag = 3/4 life-size.
May 17, 2013 19:45:21 #
Nikonian72 wrote:
I did these hand held in the kitchen - that may be part of it - but you may be right about the zoom lens - the 52-55 ring I need for the "nifty fifty" is in the mail I'll banish the zoom from macro use. Thanks You, HarveyI notice that none are tack-sharp. I suspect the use of a zoom lens. Your Canon APS-C sensor is 22.2-mm wide.
Image #1 = 13.3-mm captured = 22.2/13.3 = 1.67:1 mag. = 1.67x life-size
Image #2 = 18.6-mm captured = 22.2/18.6 = 1.20:1 mag. = 1.2x life-size
Image #3 = 29.5-mm captured = 22.2/29.5 = 0.75:1 mag. = 1:1.33 mag = 3/4 life-size.
Image #1 = 13.3-mm captured = 22.2/13.3 = 1.67:1 mag. = 1.67x life-size
Image #2 = 18.6-mm captured = 22.2/18.6 = 1.20:1 mag. = 1.2x life-size
Image #3 = 29.5-mm captured = 22.2/29.5 = 0.75:1 mag. = 1:1.33 mag = 3/4 life-size.
May 18, 2013 12:56:00 #
I use old Minolta glass because it is very inexpensive. With an adapter I can mount these on my camera and experiment. My favorite combo is a 135mm with a 50mm reversed. When I put a 28mm reversed it is way to finicky for hand held!
I have to invest in a ring flash so I can stop down; my DOF is paper thin. More adapters came in the mail today so I can start benchmarking different reversed lenses and stacked lens combos for my macro ebook.
I have to invest in a ring flash so I can stop down; my DOF is paper thin. More adapters came in the mail today so I can start benchmarking different reversed lenses and stacked lens combos for my macro ebook.
135mm w/ reversed 50mm
135mm w/ reversed 28mm
200mm w/ reversed 28mm
May 18, 2013 13:21:50 #
Yes - I too am fighting for more DOF - and the use of these old FD fixed lens in the many combinations that they make available I am sure I'll come up with a satisfactory one.
I am so new to this it has me greatly excited.
I know I'll be keeping my eyes open in thrift and secondhand store for a 100mm to work with.
I am so new to this it has me greatly excited.
I know I'll be keeping my eyes open in thrift and secondhand store for a 100mm to work with.
May 18, 2013 19:57:42 #
I tried reversing a 35-70 and just never got satisfactory results. I'm hoping to come across a 35 or 50 that won't break the bank-- so I'll wait to try reversing....
May 18, 2013 20:08:48 #
I have a Canon Nifty Fifty and I am waiting for the reverse filter thread step up ring to get here - they must be sending it by mule train- LOL I only ordered it on the 14th.
I have read that is a good lens for this.
I am fortunate to have these lens -they are FD from a couple Canon film SLR kits I was given some time ago - I just now have bought the adapters so I can use them in manual mode on my 350d Canon
I have read that is a good lens for this.
I am fortunate to have these lens -they are FD from a couple Canon film SLR kits I was given some time ago - I just now have bought the adapters so I can use them in manual mode on my 350d Canon
LoneRangeFinder wrote:
I tried reversing a 35-70 and just never got satisfactory results. I'm hoping to come across a 35 or 50 that won't break the bank-- so I'll wait to try reversing....
May 18, 2013 22:58:59 #
LoneRangeFinder wrote:
Remember, when you reverse-stack lenses, you want a wide aperture lens reversed. You can still auto-aperture the normally mounted lens.I tried reversing a 35-70 and just never got satisfactory results. I'm hoping to come across a 35 or 50 that won't break the bank-- so I'll wait to try reversing.
May 19, 2013 01:25:21 #
Nikonian72 wrote:
Remember, when you reverse-stack lenses, you want a wide aperture lens reversed. You can still auto-aperture the normally mounted lens.
Are you saying if I use the 50 as prime and reverse the 35 I need to fully open the 35 to F2 and adjust the prime by either auto or manual.?
May 19, 2013 02:25:25 #
Harvey wrote:
Exactly!Are you saying if I use the 50 as prime and reverse the 35 I need to fully open the 35 to F2 and adjust the prime by either auto or manual.?
May 19, 2013 08:46:14 #
Harvey wrote:
Are you saying if I use the 50 as prime and reverse the 35 I need to fully open the 35 to F2 and adjust the prime by either auto or manual.?
If I recall, I reverse mounted directly to my D300. So I'll have to give this another look....
May 19, 2013 12:12:31 #
And this set up - 50mm+ 35mm = 1.43 ratio thank you for your patients and help.
Nikonian72 wrote:
Exactly!
May 19, 2013 14:43:38 #
Out of respect for the people posting in this thread I will not shameless promote my ebook about intro to Macro on a budget, but I will tell you this:
You can buy a cheap adapter (<$5 usually) to reverse a lens directly on your camera. Best results are had with shorter prime lenses.
You can stack a reversed lens on any lens with the correct adapter. Male to male reversing rings can be found on eBay for <$5 usually. Best results are acheived by mounting a longer prime (85mm - 135mm) then reversing a short prime (28mm-50mm) onto it.
On my Sony, the 135mm (Minolta MD mounted to camera with a $12 MD-MA adapter) with a reversed 50mm (Minolta MD also; manual focus and aperture) gave me a working distance of 30mm from end of lens to subject, and approx. 8.5mm FOV. The same setup with a reversed 28mm gave me working distance of 35mm from end of lens, and a 5mm wide FOV
A 50mm reversed directly onto an adapter yielded 31mm FOV at 105mm from lens; the reversed 28mm gave me 11mm FOV at 49mm. I reversed a 135mm and the working distance was too great to get a focus in the area I set up my tripod.
If you stack lenses, use the reversed one to stop down because stopping down the primary lense will cause heavy vignetting. Focus adjustment does not change working distance, but going from infinity focus on primary lens to the other end of the focus will narrow FOV slightly. No noticeable difference focusing stacked lens.
I paid an average of about $15.00 per lens for these old lenses; they may cost more or less for you depending on where you get them. Hopefully I will be listing some of these as a set on my website soon, when the Chinese send me the correct reversing rings. (they sent them as male/female)
Hope this helps! Happy Macro! (can we make a macro day a holiday?)
You can buy a cheap adapter (<$5 usually) to reverse a lens directly on your camera. Best results are had with shorter prime lenses.
You can stack a reversed lens on any lens with the correct adapter. Male to male reversing rings can be found on eBay for <$5 usually. Best results are acheived by mounting a longer prime (85mm - 135mm) then reversing a short prime (28mm-50mm) onto it.
On my Sony, the 135mm (Minolta MD mounted to camera with a $12 MD-MA adapter) with a reversed 50mm (Minolta MD also; manual focus and aperture) gave me a working distance of 30mm from end of lens to subject, and approx. 8.5mm FOV. The same setup with a reversed 28mm gave me working distance of 35mm from end of lens, and a 5mm wide FOV
A 50mm reversed directly onto an adapter yielded 31mm FOV at 105mm from lens; the reversed 28mm gave me 11mm FOV at 49mm. I reversed a 135mm and the working distance was too great to get a focus in the area I set up my tripod.
If you stack lenses, use the reversed one to stop down because stopping down the primary lense will cause heavy vignetting. Focus adjustment does not change working distance, but going from infinity focus on primary lens to the other end of the focus will narrow FOV slightly. No noticeable difference focusing stacked lens.
I paid an average of about $15.00 per lens for these old lenses; they may cost more or less for you depending on where you get them. Hopefully I will be listing some of these as a set on my website soon, when the Chinese send me the correct reversing rings. (they sent them as male/female)
Hope this helps! Happy Macro! (can we make a macro day a holiday?)
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