Who Loves Their 35mm f2.5 Classic?

[Sparrow]

Full Greek sunlight on white marble outdoors, dark brown wicker chairs in full shade under the awnings, not sure what could be worse, perhaps a black cat under one of the tables!

can't get the pic working sorry LINK try that

 

[dazedgonebye]

Your pic isn't showing in that one Stewart.

 

[Sparrow]

Your pic isn't showing in that one Stewart.

try this LINK

 

[dazedgonebye]

try this LINK

I don't think you could have handled the exposure any better than you did with that one.
Very challenging.

 

[Adam-T]

Steve - the 35 Skopar is tack sharp wide open, is far faster than any other Skopar lens and unless you REALLY need the speed of the Ultron, GO FOR IT - or as I said prevously, if focussing levers drive you nuts, grab a used Mk1 Pancake or a new M mount PC2 ... I went for the 28 Ultron because it`s my main lens as I have an RD1 and need F1.9 (Heck, I need F1.2 ;-) but in the 35 area (50 on the RD1) F2.5 is enough 🙂

 

[dazedgonebye]

I've found a color skopar from a member here. I should have it next week.

Next in my sights...21mm f4.

 

[Adam-T]

Congrats! I can`t see you being unhappy with this lens by any means!..

the 21mm is knockout on film (and the M8 supposedly) , I`d have one myself but it Vigs heavily on the R-D1

 

[dazedgonebye]

Why would a lens vingette more heavily on a crop camera than a film camera?

 

[Adam-T]

Because it doesn`t present a flat image to the sensor, it`s curved - there`s quite a lot of latitude in film to take up the slack and it`s more noticable with Rangefinders because the rear element is closer to the sensor plane so the curved effect is exaggerated (SLRs have other issues such as Soft edges and CA which RFs don`t suffer anywhere near as much) ....... This is why when Leica had Kodak make the CCD for the M8, they used special Microlenses which are angled at the edges of the CCD, the RD1 uses a stock D70 CCD so doesn`t have this benefit (it also doesn`t have Magenta shifts, banding or green blob issues too thankfully !) ..

Leica Lenses present a flatter image to the sensor, as do the faster CVs such as the Ultrons and Noktons so there`s less Vigging but the Skopar series of wider lenses (35mm and wider) are prone to this on the RD1 - even the 35 does it but no where near as much - the 15mm Heliar is terrible for it, for some reason the 12mm is better, must be a better designed lens, it`s certainlu newer.. It`s not an issue with longer lenses (50, 75, 85, 90) even with old Russian stuff

 

[dazedgonebye]

Thanks,
Very clear answer.

 

[Sparrow]

Because it doesn`t present a flat image to the sensor, it`s curved - there`s quite a lot of latitude in film to take up the slack and it`s more noticable with Rangefinders because the rear element is closer to the sensor plane so the curved effect is exaggerated (SLRs have other issues such as Soft edges and CA which RFs don`t suffer anywhere near as much) ....... This is why when Leica had Kodak make the CCD for the M8, they used special Microlenses which are angled at the edges of the CCD, the RD1 uses a stock D70 CCD so doesn`t have this benefit (it also doesn`t have Magenta shifts, banding or green blob issues too thankfully !) ..

Leica Lenses present a flatter image to the sensor, as do the faster CVs such as the Ultrons and Noktons so there`s less Vigging but the Skopar series of wider lenses (35mm and wider) are prone to this on the RD1 - even the 35 does it but no where near as much - the 15mm Heliar is terrible for it, for some reason the 12mm is better, must be a better designed lens, it`s certainlu newer.. It`s not an issue with longer lenses (50, 75, 85, 90) even with old Russian stuff

Being a digital moron can you explain to me how the curvature of the field would effect the illumination rather than the resolution?

 

[Adam-T]

I guess it`s because the edges of the image are further away from the sensor plane than the middle creating light loss but not far enough to cause the image to go soft as the rear element is far closer on an RF - on an SLR the image is being projected from a far futher distance.. Leica`s special edge-angled Microlenses on the M8 and that the RD1 doesn`t go soft at the edges unless the lens is either crap or faulty bears this out whereas on a full frame or 1.3X crop SLR, the lens may not Vig but you`ll get blurry edges - 1.5/1.6X crop SLRs can still blurry edge with legacy glass but they rarely Vignette..

 

[Sparrow]

It’s a guess then? My guess would be that the curved field would effect the focus at the film/sensor plain and the illumination would be a function of lens; and remain constant regardless of the body it was mounting. I have no experience however

 

[Adam-T]

What I DO know is that the lenses aren`t soft edged on the RD1 , they DO Vig - they don`t Vig on the M8 which has the special Microlenses or Film . the CV15 is the biggest point of case, it Vigs horribly on the RD1 yet retains sharpness to the edges, on an M8 the Vigging is very slight indeed and still retains the same edge sharpness.

 

[dazedgonebye]

I guess it`s because the edges of the image are further away from the sensor plane than the middle creating light loss but not far enough to cause the image to go soft as the rear element is far closer on an RF - on an SLR the image is being projected from a far futher distance.. Leica`s special edge-angled Microlenses on the M8 and that the RD1 doesn`t go soft at the edges unless the lens is either crap or faulty bears this out whereas on a full frame or 1.3X crop SLR, the lens may not Vig but you`ll get blurry edges - 1.5/1.6X crop SLRs can still blurry edge with legacy glass but they rarely Vignette..

..


None of this would bode well for a full frame digital rangefinder.

 

[Sparrow]

What I DO know is that the lenses aren`t soft edged on the RD1 , they DO Vig - they don`t Vig on the M8 which has the special Microlenses or Film . the CV15 is the biggest point of case, it Vigs horribly on the RD1 yet retains sharpness to the edges, on an M8 the Vigging is very slight indeed and still retains the same edge sharpness.

In that case I will have to accept your direct observations

regards

 

[DougK]

I'm coming in a bit late on this one but you will not regret buying the Skopar. It's the only lens I have for my Bessa R and I love it. Deadly sharp, excellent contrast, and good with both color and B&W. I have three shots in my gallery taken with the Skopar:
http://www.rangefinderforum.com/photopost/showphoto.php?photo=20234&cat=500&ppuser=626
http://www.rangefinderforum.com/photopost/showphoto.php?photo=20235&cat=500&ppuser=626
http://www.rangefinderforum.com/photopost/showphoto.php?photo=22233&cat=500&ppuser=626