ulf Posted March 30, 2021 Share Posted March 30, 2021 Last Update: 03 April 2021 agb/label/spacingFinalized: Work in progress.Prinz Galaxy 35mm f/3.5 Manufacturer: unknownLens Label: PRINZ GALAXY 1:3.5 f=35mm No.<serial number>Currently manufactured: No Lens type: Manual focus, Prime, Wide AngleDesign: 5 elements in 5 groupsFocal length: 35mmAperture range: f/3.5 – f/22, Preset Manual, 8 bladesOptimal magnification *: ?Sensor format/coverage: up to 24 mm x 36 mmMount: M42 x 1 thread**, others. The mount is internally mounted on a T2 mount structure that can be exchanged between lensesHelicoid: YesFlange Focus distance: M42/45.46 mm,Front filter: 46 mm x 0.75 mmIntroduction year: between 1969 or earlierThis lens produced: 1971S/N of test object: 33858** Mount of test object Comment about types of PRINZ GALAXY 35/3.5: Over the years several different models of this lens were produced by different manufacturers. They have different shapes and optical performance, possibly including different UV-reach. For more info see the first link below. They belong to a big group of differently branded 35mm/3.5 lenses.More info, on the web: https://www.apotelyt...soligor-catalog http://www.savazzi.n.../35soligor.html Image of test object: The shape of the rear lens mount has often proved to be a good hint of a possibly good UV-performance for similar lenses branded differently like Galaxy and Prinz GalaxyTransmittance SummaryDefinitions of the parameters belowRange: This PRINZ GALAXY 1:3,5 f=35mm lens transmits from 1-67% in an increasing slope from 311nm to 400nm.TVISmax (%) = 83%T400nm (%) = 67%T365nm (%) = 59%This high percentage is an indicator for relatively short exposure time under typical UV-pass filtration peaking around 360 nm or when using 365 nm UV-LED illumination.λUV HMvis(nm) = 341nmλUV HM400(nm) = 335nmλUV Zero(nm) = 311nmThese three values indicate that the lens is working for upper UV-B photography with some filters and the few for this, suitable cameras.Spectral Transmission GraphsUV-NIR, PRINZ GALAXY 1:3,5 f=35mmThe transmission measurement accuracy into the end of NIR range is less good due to limitations in the light source. UV, PRINZ GALAXY 1:3,5 f=35mmUV-Log, PRINZ GALAXY 1:3,5 f=35mmNumerical Spectra Data available: Yes General comments about the UV-reach:tbaFilters and how to use them on this lens:The front filter thread is 46mm standard filter thread. It is also possible to use rear mounted filters, either in lens mount adapters for mirrorless cameras like Sony A-series etc, or placed directly in the camera. An alternative, if space in the camera allows, is to putty-mount a filter directly against the lenses rear element mount ring. The rear lens element is recessed and thus safe and the ring provides a good reference plane for orienting the filter normal to the optic axis. Handling and focussing:TBD Flare and sun-stars: TBD Sharpness: TBD Lens distortion:TBD Chromatic Aberration in UV:TBD Link to comment
Andrea B. Posted March 30, 2021 Share Posted March 30, 2021 That was interesting! The Prinz Galazy 35/3.5 has some reach. Nice.I had wanted to remember to add some of Enrico's links for lenses like this so folks can read more. So thank you for doing that! Link to comment
Stefano Posted March 30, 2021 Share Posted March 30, 2021 This lens is practically identical to the Soligor 35 mm f/3.5. Very similar "look" and almost identical transmission. Here's a comparison: https://www.ultravioletphotography.com/content/index.php/topic/3412-relative-transmission-measurement-of-two-35mm-lenses-prinz-galaxy-and-soligor Link to comment
Andrea B. Posted March 30, 2021 Share Posted March 30, 2021 There are so many of these 35/3.5 lenses which look alike that one would go slightly nuts trying to list them all.Here was an interesting collection which Alex H had: http://www.ultraviol...f-3535-presets/ Link to comment
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