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  1. Re: Super Angulon vs. Biogon at higher magnifications

    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...
  2. Re: Super Angulon vs. Biogon at higher magnifications

    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...
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    Re: Chamonix 045N-2 and 90mm Lens

    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
  4. Super Angulon vs. Biogon at higher magnifications

    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...
  5. Re: Possibly the largest online collection of color large format images

    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...
  6. Re: Narrow field, non-telephoto lens design question

    Thanks everyone for the informative replies and links to resources. Lots of food for thought.
  7. Narrow field, non-telephoto lens design question

    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...
  8. Re: That's not what I expected! - what to do with an eBay purchase...

    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!)
  9. Poll: Re: What's your #1 anxiety about LF (in your personal life)?

    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.
  10. Re: Ebony SW45 vs. SH TFC-45 II B with heavy lenses and full extension

    Thanks everyone. Will look in to the SW45 then.

    Jac: Thanks for the additional info on work arounds. Creative thinking is always appreciated!
  11. Ebony SW45 vs. SH TFC-45 II B with heavy lenses and full extension

    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...
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    Re: Fujinon W 300mm F5.6 image circle?

    Couldn't access the subclub.org site... here's another list:
    http://www.willwilson.com/fujinonlc2.html
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    Re: Is the 47mm the widest lens, period?

    Would be interesting to hear your reasons, Drew. Always nice to learn something new.
  14. Re: Non-coated (uncoated?) enlarging/repro lens options no more than 60mm (more detai

    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...
  15. Non-coated (uncoated?) enlarging/repro lens options no more than 60mm (more details)

    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...
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    Re: Is the 47mm the widest lens, period?

    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...
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    Re: Suggestion for drying cabinet heater

    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...
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    Re: Is the 47mm the widest lens, period?

    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...
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    Re: Is the 47mm the widest lens, period?

    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...
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    Re: Is the 47mm the widest lens, period?

    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...
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    Re: Is the 47mm the widest lens, period?

    The widest modern rectilinear lens is 131 degrees:
    http://genotypewritings.blogspot.com/2013/08/widest-ultra-wide-angle-lens.html
  22. Re: Epson v750 error - unable to allocate memory

    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.
    ...
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    Re: Epson V750 a lot of problems...

    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...
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    Re: Fujinon S 300mm f/5,6 copal 3

    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...
  25. Re: Relationship between ground glass and lens

    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...
  26. Re: Relationship between ground glass and lens

    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...
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    Re: Lens like Mamiya RZ67 110mm

    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...
  28. Re: Relationship between ground glass and lens

    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 :)
  29. Re: Relationship between ground glass and lens

    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?)...
  30. Re: Relationship between ground glass and lens

    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...
  31. Re: Difference between Xenotar 135/3.5 and Zeiss Planar

    [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...
  32. Re: Non-folding 4x5 with rangefinder choices?

    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...
  33. Non-folding 4x5 with rangefinder choices?

    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...
  34. Re: Which lens design is shown in this diagram? f/4.5, 10 elements, 8 groups, 78

    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...
  35. Re: Which lens design is shown in this diagram? f/4.5, 10 elements, 8 groups, 78

    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...
  36. Re: Which lens design is shown in this diagram? f/4.5, 10 elements, 8 groups, 78

    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...
  37. Re: Which lens design is shown in this diagram? f/4.5, 10 elements, 8 groups, 78

    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...
  38. Which lens design is shown in this diagram? f/4.5, 10 elements, 8 groups, 78

    101379
    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...
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    Re: f/4.5 Heliars vs. f/4.5 Tessars

    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...
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    Re: f/4.5 Heliars vs. f/4.5 Tessars

    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...
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