Archived posting to the Leica Users Group, 2012/10/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]There's also just putting the lens on the camera and using it. I do think the odds of something being wrong with it are slimmer than god. When I got set up for 4x5 in 1989 I got a Calumet Cambo 45NX 4x5 from Calumet and tried to get a Nikkor W 210mm f/5.6 which a few people I knew, photographers, used. They were out and also on the facing page in the Calumet Catalog were the Nikons at first cheaper than exactly the same price. So I got a W 210mm f5.6 lens Fujinon instead. It was $490.00 was would be the Nikkor. I never tested it. I just used it. Pretty much the same technique any photographer I ever met would take. Buy the lens; use it. if I picture comes out a little weird trust me its YOU that messed up not the lens. Mark William Rabiner Photography http://gallery.leica-users.org/v/lugalrabs/ > From: "Henning J. Wulff" <henningw at archiphoto.com> > Reply-To: Leica Users Group <lug at leica-users.org> > Date: Wed, 17 Oct 2012 01:12:40 -0700 > To: Leica Users Group <lug at leica-users.org> > Subject: Re: [Leica] OT: large format lens vs. medium format lens > > Sorry, Richard, I saw the earlier post on the Nikkor and that stuck. The > Fuji > f/4.5 is just about the same as the Nikkor f/4.5; both are older designs > from > the early 70's similar to the Grandagon and the SA 90/5.6. Not all that > good > until f/16, and then they have very good and even performance. > > As far as checking, you have to find someone who has a good optical bench > and > knows what he's doing. There was someone here in Vancouver until the late > 90's > who did that for me, but I don't know anyone who does that now. > > Do you have a 4x5 camera or a camera with a good 6x6 or 6x7 back you can > check > this lens on? Those would be better than a 6x17 back. The film flatness > problem with 6x17 is quite severe, from what I've heard. For a number of > Photokinas we stayed at the same hotel as Ken Canham, and he was trying, > reasonably successfully, to make the first 'flatter' 6x17 back. Not having > tried any, I had to take his word for it. I'm not sure Shenhao got it > right; > Ken didn't think so. > > Henning > > > > On 2012-10-17, at 12:17 AM, Richard Man wrote: > >> Henning, as I amended, it's a Fuji SWD and not a Nikkor. >> >> So how do I check if the spacing is correct? This pages talks about lens >> mounting a bit, but no method on checking: >> >> http://lensn2shutter.com/lensmounting.html >> >> Again, more (rigorous) tests tomorrow. >> >> Thanks >> >> On Wed, Oct 17, 2012 at 12:04 AM, Henning Wulff >> <henningw at archiphoto.com>wrote: >> >>> While the 617 holders have more problems with film flatness, the lens >>> does >>> come into play as well. Which Nikkor 90 is it; the f/8 or the f/4.5? The >>> f/8 is a little sharper in my experience at f/11. While quite decent, >>> they >>> are not quite up to the standard of the newer lenses like the SA-XL line >>> or >>> especially the Super-Symmar XL. In practice this is extremely hard to see >>> if you are shooting at f/16 and smaller. I have some SA-XL lenses and the >>> 47 is actually a little sharper than the T* Biogon in my SWC as is my 35 >>> Apo-Grandagon at f/8. At f/4.5 the Biogon is sharper overall, and at f/11 >>> you can't tell the difference. In practice, the SWC usually produces >>> sharper pictures because my best roll film back (6x7) doesn't hold film >>> as >>> flat as the Hasselblad backs. But the 47 covers 4x5, and the 35 covers >>> 6x12. >>> >>> Also, make sure the 90 Nikkor is mounted correctly. About half the LF >>> lenses I have were mounted with incorrect spacing between the front and >>> back cells. All lenses I obtained through Sinar or that were originally >>> sold by Sinar or Linhof were mounted correctly; my Nikkors from Nikon in >>> Copal shutters (3) were all mounted out of tolerance and had improved >>> performance after adjustment. >>> >>> Henning >>> >>> >>> >>> On 2012-10-16, at 10:36 PM, Richard Man wrote: >>> >>>> The Shenhao 617 holder. There have been talk about 617 holders (not just >>>> Shenhao's) do not keep the film flat enough :-( >>>> >>>> On Tue, Oct 16, 2012 at 10:22 PM, Frank Filippone <red735i at >>>> verizon.net >>>> wrote: >>>> >>>>> the lens will cover the format.........and it is pretty modern, so it >>>>> should >>>>> be pretty sharp. >>>>> >>>>> The image circle of the 90 Nikkor SWD is 238mm. >>>>> The 6x17 format has a diagonal of 180mm. >>>>> >>>>> Back to the questions about film flatness.... and "floppiness" in the >>>>> camera... The SWC is exceptional in this regard..... >>>>> >>>>> What film "holder" are you using? >>>>> >>>>> Frank Filippone >>>>> Red735i at verizon.net >>>>> >>>>> >>>>> -----Original Message----- >>>>> From: lug-bounces+red735i=verizon.net at leica-users.org >>>>> [mailto:lug-bounces+red735i=verizon.net at leica-users.org] On Behalf >>>>> Of >>>>> Richard Man >>>>> Sent: Tuesday, October 16, 2012 10:08 PM >>>>> To: Leica Users Group >>>>> Subject: Re: [Leica] OT: large format lens vs. medium format lens >>>>> >>>>> Mainly the Nikkor 90mm SWD, but I think the other lens are similar... >>>>> >>>>> On Tue, Oct 16, 2012 at 10:02 PM, Frank Filippone >>>>> <red735i at verizon.net>wrote: >>>>> >>>>>> Film flatness plays its part.... >>>>>> Your lens is trying to project an image circle equivalent to a 5x7 >>>>>> negative area....not an easy task.... >>>>>> >>>>>> What lens are you using? >>>>>> >>>>>> Frank Filippone >>>>>> Red735i at verizon.net >>>>>> >>>>>> Always been my understanding of it, not the same enlargement so not >>>>>> the same lens resolving. Newer LF lenses are much better than most old >>>>>> ones though.... >>>>>> >>>>>> john >>>>>> >>>>>> -----Original Message----- >>>>>> >>>>>> As Iwas formulating the question, it sounds like the answer IS >>>>>> obvious, but just want to confirm. >>>>>> >>>>>> I am testing the Shenhao 617 and it could be my focusing techniques >>>>>> and other issues, but it appears to me that the images are not as >>>>>> sharp on the same film as images made by, well, the Hassy SWC. >>>>>> >>>>>> Yes, I am expecting someone to jump in and say of course the SWC is >>>>>> razor sharp because it's the legendary Biogon etc., but I am now >>>>>> thinking that this generally will be the case, as the large format >>>>>> lens are designed to cover large negative (and the smallest 4x5 dwarfs >>>>>> the 617) so they do not generally have the resolution and sharpness >>>>>> that a good medium format lens has. >>>>>> >>>>>> Is this correct? >>>>>> >>>>>> -- >>>>>> // richard <http://www.richardmanphoto.com> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Leica Users Group. >>>>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Leica Users Group. >>>>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> // richard <http://www.richardmanphoto.com> >>>>> >>>>> _______________________________________________ >>>>> Leica Users Group. >>>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>>> >>>>> >>>>> _______________________________________________ >>>>> Leica Users Group. >>>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>>> >>>> >>>> >>>> >>>> -- >>>> // richard <http://www.richardmanphoto.com> >>>> >>>> _______________________________________________ >>>> Leica Users Group. >>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>> >>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >> >> >> >> -- >> // richard <http://www.richardmanphoto.com> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > Henning Wulff > henningw at archiphoto.com > > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information