I read the same thing about the aperture but i'm wondering why some focal length has pair and other impair number.
Which focal length have 3,5 and 7 marked on them. I saw both on the web but most of...
Type: Posts; User: mylek; Keyword(s):
I read the same thing about the aperture but i'm wondering why some focal length has pair and other impair number.
Which focal length have 3,5 and 7 marked on them. I saw both on the web but most of...
Hi,
i'll like to know which focal length for the Darlot hemispherical wide angle lens has the number 3,5 and 7 on its aperture lever. I'm also seeing some with 4,6 and 8 like a #3 5".
Regards!
Thanks Steven!
It makes sense with the serial number i'm seeing. When there is only an arabic or roman number, how can we difference them between IV and VI?
Hello,
lately, i see often for sale some Voigtlander Euryscop with different writing. What is the difference between a "Portrait Euryscop III #3, Portrait Euryscop 3A or only 4" written on the...
Any ratio for the Bee wax/Lavender oil mixture?
I'm trying to waxed Ziatype and salted prints but it is not easy maybe i don't put enough oil.
Regards!
Pierre,
What do you mean by "It's too easy ~" To fix it?
What will be a good refund on this issue, how many % will be acceptable?
The seller said , it was fixed and was operating properly but he probably weakened the rod and it broke during shipping.
For the glass, there is no separation, delimitation BUT they have circular...
Thanks Steven,
It is looking like if they had replaced the screws by studs and then welded them to the cover. I agree with you if the shaft and gear are made in one piece, i won't be able to fix...
I was aware that this is an Aplanat lens but it was easier to describe the problem.
It seems that somebody at some time welded the cover of the gear on the lens so i'm less tempted to removed it....
Thanks for the answer!
The lens is a Voigtlander Portrait Euryscop series II.
Hello,
i just bought a petzval lens and when i unpacked it, i found out that the focusing knob broke during shipping. I've talked with the seller and he agree to refund me but i'll like to keep...
Thanks Garrett,
i have smaller petzval but i'll like to move up to 8x10 plate. Most of the big name Petzval lenses are nice but too big and pricy for my lens board.
I missed a Vitax #2 (13 1/2)...
I'm looking to buy a lens to do some wet plate head and shoulder portraits on whole plate and 8x10.
Is there a lot of difference between the Portrait Euryscop series II and III apart their maximum...
Thanks for all the answer.
Hello,
i'll like to make some waterhouse stops for a unknown Petzval 300mm (12") but i can't figure out how to calculate it properly its aperture.
Front glass has a diameter of 80mm so f/3.8 and...
Thanks everybody!
Lots of information to digest before i make a move but i think i'll go with the 300m even if it a new one with the 7,7 grid.
If i understand well, i will loose only the...
Hello,
with the Imagon 300mm lens, there is 2 versions according to the shutter used and i'm wondering if the 5,8-7,7 grid is really useful.
What i will be losing without it?
Will a 250mm lens...
They are look alike but mine is bigger.
Steven,
in the page 39 of the hand written ledger, it is recorded as a 2B.
The patent is for the lens swap so mine like the original petzval.
From D.Colucci'S web site:
"In 1866, Dallmeyer...
Mine is like the one picture on the left. S/N 6504.
http://www.thedallmeyerarchive.com/Records/lensident/portrait.html
Was the patent for the soft focus feature only or with the change of...
Hello,
i got a Dallmeyer 2B pre patent, so it was made before the soft focus patent.
Did they already reverse the lens's rear group compare to the original Petzval design or they did after the...
Hello,
i have a Seroco (Conley/Vista) portrait lens series II 10in f/5 with an iris but there is no marking or scale on it. I''ll like to marked it.
If i'm using the focal length/diameter...
I'm looking for a replacement back that will fit on a Deardorff 5x7 for a project.
Is there any back from others companies that will fit it, Eastman, Wisner...?
The Deardorff's back measure 8 3/4"...
Thanks!!!
Thanks!
I have a Graflok back installed and the fresnel is in front of it, so i will place the ribs toward the ground glass as it is the other way.
Also, there is a wooden spacer between it and...
Hi,
i bought a reducing Deardorff back from 5x7 to 4x5. I was surprised that there is a fresnel installed in front of the ground glass.
I'll like to know what is the proper way to installed it...
i Guess this is the problem because it is really off compare to 3 others lens...
I can't look at the achromat because i can't removed it but it seems to be installed properly.
I'll try again to...
After reading about spherical aberration, i realized this lens wasn't corrected. It is normal that my focus point is behind my target.
What will be the best way to focus it so i can sharper image at...
Thanks!
Glass is clean but have a slight separation on front element (Blue color).
This is the way i reinstalled it.
If i compare the ring between the lens in the rear element, it is thinner...
Hello.
first happy new year to everybody!!!
I bought an unknown Petzval lens last year. I tried it with film and i noticed it had a kind of glow and was a bit off focus.
Today, i tried it...
This is the link Goamules was talking about in tread #13,,,
http://www.mauritsbollen.com/Petzval-Lens-Swirl
WTF is so hard to understand?[/QUOTE]
Nothing, i was just asking to see what others photographers were using to be on the safe side...
I'm interested to try a Petzval lens with 5x7 and it is the...
Yes, like a 8 or 9" f/4 Derogy, Dallmeyer... It is tight on the 4 1/2" lens board but it works.
I'm concerned with the fragility of the front part. If it was to be used on a let say B&J Rembrant...
Will something like a 8" f/4 Petzval or a 300mm f/4.5 Heliar be too heavy?
Will it put too much stress on the front frame?
I like to know what is the biggest (or/and heavier) lens i can use safely on a Deardorff 5x7 without damaging the front frame of it.
I know that the 41/2" lens board is a limitation.
Regards!
It is looking like the Aplanat's number. I saw a #5 calling for 9 1/2" and another one at 10".
What were their main focal length even before starting to numbering the barrel?
it is funny to read that Derogy was one of the first lens maker that went in the mass production while at the same time it is so hard to find any information even in the VM...
I'm looking to know...
i'll like to know how the waterhouse stop system is working?
Is it starting with #1 as the reference for the lens 's aperture then halfing for 2 , etc...
I have a Voigtlander Euryscope IV #3 which...
Hello,
i'll like to give a try at some EFKE PL 25 ort film in the 5x7 format.
I read that 6 min in D76 is a good start for tray development but how are you processing with continuous agitation...