A new sexy 1.1 lense for my RD1 ???

Well I also have the Nokton on order. Focusing has never really seemed to be a problem for me in the past. I have an M8 and MP 0.58VF... After reading some of the posts I get the impression that this lens is going to be difficult for the VF that I have. Should I see about getting a 0.6x VF??? Will this help for the 50mm range and focusing a 1.1?

thanks
 
padraigm said:
Well I also have the Nokton on order. Focusing has never really seemed to be a problem for me in the past. I have an M8 and MP 0.58VF... After reading some of the posts I get the impression that this lens is going to be difficult for the VF that I have. Should I see about getting a 0.6x VF??? Will this help for the 50mm range and focusing a 1.1?

thanks
Click to expand...


Mostly it's never a problem. But for VERY fast lenses at full aperture, under about 3 metres (10 feet), you may need to take more care with focusing than in always feasible. Remember that the Voigtländer RF base is only about 2/3 the Leica base to begin with, before allowing for viewfinder reduction. In other words, a a 0.58 Leica starts out slightly better than a Voigtländer (a longer base, reduced, is more reliable than a shorter base, magnified, because errors are diminished, not magnified).

Tashi delek,

R.
 
focus accuracy has to do with focus distance and its effect on dof... you can't make generalization on can or cannot focus, or even "skill," it matters how you intend on using it. Even with the best SLR system, you wouldn't get perfect handheld f1.1 shots of near subjects.
 
From experience I find my M-Hexanon 50mm f1.2 no harder to focus on the M8 as it is on the M5, but the M8 delivers more keepers. Not sure about the magnification on either camera (seems pretty much the same), I hold the crop factor partly responsible. The smaller sensor adds to the DOF.

I suspect this is the same on the Epson R-D1, the smaller sensor adds to the DOF and does compensate for the (too) short EBL.

Would be interesting to see this quantified with mathematical formulae, since I have only found this page so far on the subject.
 
From experience I find my M-Hexanon 50mm f1.2 no harder to focus on the M8 as it is on the M5, but the M8 delivers more keepers. Not sure about the magnification on either camera (seems pretty much the same), I hold the crop factor partly responsible. The smaller sensor adds to the DOF.

I suspect this is the same on the Epson R-D1, the smaller sensor adds to the DOF and does compensate for the (too) short EBL.

Actually, it is the contrary: on a smaller sensor, you have less DOF, due to the fact that a circle of confusion of the same size will be bigger relatively to the smaller sensor. Depth of field is smaller on the R-D1 than on the M8, and smaller on the M8 than on film or full frame.
 
efkbl said:
...Actually, it is the contrary: on a smaller sensor, you have less DOF, due to the fact that a circle of confusion of the same size will be bigger relatively to the smaller sensor. Depth of field is smaller on the R-D1 than on the M8, and smaller on the M8 than on film or full frame.
Click to expand...
Contrary to the contrary ;) The smaller the sensor the wider the DoF.
 
DoF is governed by magnification.

First by the magnification on the sensor (smaller sensor = bigger DoF)

Second by the magnification of the final image (bigger print from a given negative/sensor = smaller DoF)

Not forgetting, of course, that a longer lens will give more magnification at a given subject distance, so you need to step back to get the same overall image size on the sensor.

But then, DoF is to a surprising extent subjective anyway...

Tashi delek,

R.
 
Roger Hicks said:
DoF is governed by magnification. First by the magnification on the sensor (smaller sensor = bigger DoF)
Click to expand...

Wait a minute Roger.

Have you looked at the lens focal lengths on typical digital p&s cameras?

At the wide end they are around 7mm. These super wide-angle lenses are the reasons DoF is so great, not the sensor size.

You could stick a 35mm lens on a small sensor camera but with a crop factor of 4x you would end up with a minimum eFoV of 140mm.

Because consumers want to have zooms with a wide-angle view, camera makers have no choice but to stick fish-eye lenses on their cams.
 
I have exactly the same lenses [28/1.9 and 50 1.5] BUT I also have have 35/1.7,21/2.8, 15/4 and 12/5.6.
The 50mm is the least used of all these [75mm 35mm equiv on RD1] in fact most used is 28 and 21 [equiv to 42 and 30ish on 35mm =ideal RF focal lenghts IMHO] usually on 2 RD1 bodies [have 3]
So my 2cs why bother even for an extra stop unless its for pose value?:confused:
Clive
 
I thought that one of the advantages of a digi was the ability to crank up the ISO? Get a decent f/2 and save your money. You'll need it for the ladies when you get the urge for sexy.
 
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