Thanks for the detailed reply, Emmanuel. You have a good point about the coverage as well as Hologons.
Anyone have an idea about how a SA compares to a Biogon w.r.t. the aberrations I mentioned...
Type: Posts; User: genotypewriter; Keyword(s):
Thanks for the detailed reply, Emmanuel. You have a good point about the coverage as well as Hologons.
Anyone have an idea about how a SA compares to a Biogon w.r.t. the aberrations I mentioned...
Thanks for the reply, Dan. The question was more about the general designs than exact implementations. I.e. keeping aside availability under various formats, is it possible to draw any generalised...
I pity the 4x5 that can't do a 90mm :)
Here's the 045N2 with a "17mm" with no recessed boards:
http://genotypewritings.blogspot.com.au/2013/08/widest-ultra-wide-angle-lens.html
Hi everyone,
Keeping aside any differences between lenses using even the same design and assuming common apertures, generally speaking, would one design show fewer aberrations than the other at...
Thanks for the pointer. I've cleared up the submission rules to read:
Film area must be equal to or greater than the area of 4x5" sheet film (11712 sq.mm or 18.15 sq.inches). E.g: No roll film...
Thanks everyone for the informative replies and links to resources. Lots of food for thought.
Hi everyone,
If we assume that 45-60 degrees of coverage as neither wide or long, are there lenses with significantly narrower fields (e.g. 30 or less) that are non-telephoto designs (in any...
Hey pssst... I have some glass... want a deal? ;) There might be a super rare Superachromat Quartz Topogon used by AA in there...
(I'm kidding of course!)
I voted 6. I shoot reversals a.k.a. hardly any choices.
It's like a systematic killing... you make people eat lobster everyday they will still get sick of it.
Thanks everyone. Will look in to the SW45 then.
Jac: Thanks for the additional info on work arounds. Creative thinking is always appreciated!
If the title didn't give the question away: Does anyone have experience with the Ebony SW45 or Shen Hao TFC-45 II B and lenses around 2.2lbs/1Kg at maximum extension?
I know that both Ebony and...
Couldn't access the subclub.org site... here's another list:
http://www.willwilson.com/fujinonlc2.html
Would be interesting to hear your reasons, Drew. Always nice to learn something new.
Thanks Roger... started looking them up. I'll be relying mostly on online (international, as there aren't many local) options.
Couldn't find any Adotals but there are a few Apotals around but...
Hi everyone,
Looking for advice on an enlarging/repro lens and I have a few requirements:
1. Focal length must be around 60mm or shorter.
2. Must have no coatings (or have broadband coatings...
It's not a bad idea to read a thread before chiming in... for example many rectilinear lenses wider than a 13mm on the 35mm have been mentioned here.
And no... the Nikon 13 is far from it. The...
I'm reluctant to think that heat is a good idea unless there's a way for the hot vapors to exit. You don't want your lenses to turn in to dim sims :)
How about using desiccant and a very low power...
Schneider's Super-Digitar XL 28/5.6 ("apo") is rated as having a 90mm image circle, capable of fitting a full-width 6x7 (56x70) frame. It will have more coverage but you'll need to get your hands on...
I think it's fair to say that the OP is asking about wide lenses, not wide image acquisition techniques. If you're getting in to the realm of stitching then 360x180 degrees has been done ages ago and...
They don't sound all that absurd, Dan. Lenses that do 122 wide open aren't uncommon in smaller formats. Some even as bright as f/4.5 and none of that 0 relative illumination stuff either. I gave a...
The widest modern rectilinear lens is 131 degrees:
http://genotypewritings.blogspot.com/2013/08/widest-ultra-wide-angle-lens.html
Do you get 32 bit and 64 bit versions?
Also, VueScan can be downloaded for free to see if it works. You can keep it straightforward enough (like Epson Scan) without going in to all the details.
...
To isolate whether it's the software or the hardware (very likely it's the former), download vuescan (for free) and see what you get from it. In the end, vuescan is highly recommended for serious...
Looking at some of the photos of the S version, it doesn't seem to be the same optical formula as what the L has. The L's front barrel diameter is nearly the same diameter as the Copal 3 thread...
Wasn't aware that you had the lens for several years and that it worked back then. In that case you might be right about the possibility of something deteriorating. I'd still expect to see some tell...
A couple of things have left me (and I'm sure some others) confused in isolating the problem. This is what I've gathered from what you've said:
1. On the GG, the image is sharp in the center but...
If your reasoning is "that warm feeling I get"... then there's very little that anyone can do to help you because you're talking about a very personal thing. Even if you find an identical design of...
Not sure if you missed my question earlier but what range of f-stops do you end up shooting at usually?
I don't call a lens a special one until it performs the way I want it to perform :)
Hi Steve,
Your observation about center being easier to focus the way you want is consistent with what I've said. I can't speak for all wide angle lenses (which other wide angles do you have btw?)...
Hi Steve,
I think the question we all have on our minds is what format size the camera is :)
Ultra wide lenses like the SSXLs (I can speak for the 110 SSXL but the designs are similar across...
[QUOTE=richardman;1085079]This is my test with the Xenotar 135/3.5 on a Chamonix F1 Acros 100. Some people object to the bokeh. I toned it down at post here (sorry, bad me).
It would be quite a...
Thanks everyone for the replies. To answer some questions...
Why not a Graflex-type press camera? I have nice Speed Graphic with a fully accurate shutter. The problem is opening+pulling out... I...
Anyone have any suggestions for a non-folding portable 4x5 camera with a coupled-rangefinder?
I'm not looking at the more common Polaroid-conversions as they require opening and closing. The...
Thanks everyone for the interesting points raised.
I'd like to add that while the SSXL (4.5 or otherwise) has aspherical elements which likely reduced the number of spherical elements needed for...
Thanks everyone for the interesting points raised.
I'd like to add that while the SSXL (4.5 or otherwise) has aspherical elements which likely reduced the number of spherical elements needed for...
Thanks for the inputs everyone. I didnt have a look at the Digitar and Digaron era designs. Didn't think they would be any more relevant than SLR designs because they're made to have a long back...
Thanks :) but I was hoping if anyone knew if it's similar to any classic designs like biogon, etc. The lens looks similar to a reversed Voigtlander Ultron 28/2 but some +/- surfaces are -/+ so I...
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Left: Object end
Right: Image/film end
Max aperture: f/4.5
Construction: 10 elements in 8 groups
Angle of good coverage at ∞: 78° from f/4.5
Optimised focal distance: ∞ and thereabouts...
I see... so the Universal Heliar and the original Heliar should have the same coverage when the UH's movable element is in the same place? Was wondering if there was something in the way the barrels...
Thanks, everyone, for the replies and the interesting inputs.
By any chance does anyone have an MTF graph of a f/4.5 Heliar or a f/4.5 Universal Heliar? I was thinking about extrapolating the...