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jamesdak
Joined: 20 Jun 2007
Posts: 59
Location: Utah, U.S.
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 Posted: Sun Apr 06, 2008 1:16 am Post subject: Minolta RF 800/8 on 5D vs 400/5.6 & 1.4x on 30D |
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jamesdak wrote:
Alright, for me this is the definitive test to see if I am really gaining any added capacity with this 800mm mirror lens. So I ran a comparision test about 20 minutes apart. The 800mm was on the 5D. The lens was on one tripod and the 5D on another (bit of a pain). The 400/5.6 was used with the 1.4x tcon and mounted to my 30D for about the same "reach". But I only used the lens mount of the 400 to steady this one. I used MLU and and remote for both and shot at ISO 400. The mirror seems to meter differently and had a higher shutter speed. So, despite more support and higher shutte speeds the 400mm combo is better in my opinion. To be specific, this is a Minolta RF 800/8.0 made in a Leica R mount against my Canon 400/5.6 and Canon 1.4x teleconvertor. Focusing was done manually on both using an anglefinder set at 2x to get critical focus.
Judge for yourself. The are unprocessed 100% RAW crops.
The 400mm
The 800mm
The 400mm
The 800mm
I see no justification to keep the 800mm show it goes back via their return policy. First time I've actually sent something back. Since this was my first time shooting with a mirror I wonder if this one is just bad or typical of results.
_________________
MF lenses: Contax Zeiss 28/2.8, 35/2.8, 50/1.4,
85/2.8, 100/2.0, 135/2.8
Leica 50/2.0, 60/2.8 macro, 90/2.8, 135/2.8, 180/3.4, 560/6.8
Pentax SMC 50/1.4, SMC 135/3.5,
Olympus OM 24/2.8, 35/2.8 PC
Vivitar 90/2.5 macro
Nikon 800/5.6
DSLR, Canon 5D and 40D
About a dozen Minolta mf bodies and the same in Minolta MF lenses. |
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jimbob
Joined: 15 Mar 2007
Posts: 6
Location: Guelph Ontario Canada
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| Posted: Tue Apr 08, 2008 5:41 pm Post subject: |
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jimbob wrote:
Hello jamesdak,
Thank you for this post, I have the 20D with the 400 f5.6 and use it with the 1.4x and the 2x sometimes. The mirror lockup sure helps with the 2x I have found.
Jim. |
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F16SUNSHINE
Joined: 20 Aug 2007
Posts: 5486
Location: Left Coast
Expire: 2011-11-18
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| Posted: Tue Apr 08, 2008 6:02 pm Post subject: |
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F16SUNSHINE wrote:
Hello James
This is a nice comparison. I'm not surprised by the poor IQ of the 800 mirror. What is a pleasant surprise is the quite respectable performance of the 400 and TC. You have a keeper there I think.
Andy |
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Orio
Joined: 24 Feb 2007
Posts: 29545
Location: West Emilia
Expire: 2012-12-04
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| Posted: Tue Apr 08, 2008 8:16 pm Post subject: |
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Orio wrote:
yes, fire the 800 and keep the 400 with the multiplier.
_________________
Orio, Administrator
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jamesdak
Joined: 20 Jun 2007
Posts: 59
Location: Utah, U.S.
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| Posted: Wed Apr 09, 2008 2:07 am Post subject: |
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jamesdak wrote:
The 800mm is one it's way back home with it's tail tucked between it's legs.
_________________
MF lenses: Contax Zeiss 28/2.8, 35/2.8, 50/1.4,
85/2.8, 100/2.0, 135/2.8
Leica 50/2.0, 60/2.8 macro, 90/2.8, 135/2.8, 180/3.4, 560/6.8
Pentax SMC 50/1.4, SMC 135/3.5,
Olympus OM 24/2.8, 35/2.8 PC
Vivitar 90/2.5 macro
Nikon 800/5.6
DSLR, Canon 5D and 40D
About a dozen Minolta mf bodies and the same in Minolta MF lenses. |
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F16SUNSHINE
Joined: 20 Aug 2007
Posts: 5486
Location: Left Coast
Expire: 2011-11-18
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| Posted: Wed Apr 09, 2008 4:52 am Post subject: |
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F16SUNSHINE wrote:
Good one. |
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