The above video is the short version. If you would like to see the test images for image quality larger please click on the photos.
This L39 or Leica Thread Mount (LTM) short telephoto lens was one of the first lenses release with the launch of Cosina’s Voigtländer branded camera line. It was discontinued in 2010 with the introduction of the 75mm f1.8 Heliar Classic in August of 2010. The 75mm f2.5 can still be purchased as new old stock from some resellers ( Cameraquest being one of them) for $689 USD or second-hand on eBay for around $300. I bought this lens new in 2004 and put a LTM to M adapter on it to use with a Bessa R2.
The original Heliar design was developed in 1900 by Dr. Hans Harting as a symmetrical 5-element variant of the simple anastigmatic and well color-corrected Cooke triplet. In 1902 the design was revised correcting astigmatism, curvature and coma better than the original design. That new design was asymmetrical six elements in five groups. In 1950 Dr. A.W. Tronnier refined the design even further to produce the Color-Heliar. When Cosina revitalised and relaunched the Voigtländer line they revived the Heliar concept with the 75mm f2.5 Color-Heliar. Cosina wanted to recreate the German optical aesthetic and engineering quality. This modern lens has a definite 1950’s look with its beautiful all metal construction. The scalloped focusing ring and ribbed aperture ring aid grip and the focusing ring is nicely dampened and has a throw of approximately 90º. The aperture ring has full and half click stops. The lens comes with a lens hood and it as well as the lens cap are made of brass. The lens hood is a push on fit over the lens hood, a particularly nice touch is the strip of velvet inside the cap to increase the friction between it and the lens hood. The gloss black finish does tend to wear but as it does so it creates a wonderful patina with the brass showing through.
Mount – L39
Six elements in 5 groups
Aperture blades – 10
Aperture range – f2.5 -16
Angle of view on 35mm – 32º
Closest focusing distance – 1m
Filter size – 43mm
Diameter – 55.5mm
Weight – 230g
Vignetting is present at f2.5, but by f5,6 it has completely disappeared. Lateral or transverse chromatic aberration is present throughout the aperture range, but it is well controlled and very slight. It is easy to remove in Lightroom as is the slight pincushion distortion using the lens correction profiles. Wide open the centre is very sharp and contrasty while the edges are a little softer and less contrasty. At f5.6 the corners are as sharp and contrasty as the centre. Diffraction starts to kick in at f11 and decreases the optical quality. There is focus shift as the lens stops down and the lens breathes when focusing.
The minimum focusing distance of 1 metre does preclude its use for head and shoulders portraits unless you use something like the Fotodiox DLX Stretch or the Voigtlander VM/E Close Focus Adapter which gives 4mm of extension and allows focusing as close as 0.65m. For half-length portraits the lens renders the background out of focus beautifully when shot slightly stopped down at f2.8 with lovely tonal transitions. This makes it a great lens for street photography and events. The fly in the ointment is that the total depth of field for 1.5m distance using an aperture of f2.8 is just 0.07m or 7 cm or 2.77 inches and the focus peaking on my A7r is not sensitive enough to make accurate focusing possible 100% of the time so I have to use the focus magnifier to punch in and fine adjust.
Now according to the pixel peepers on the forums at DPReview it is impossible to shoot moving subjects with anything less that a Nikon D5 or a Canon 1DX Mkii. In fact I get a an attack of hysterical laughter every time some one makes a post about wanting to take pictures of their young children and they are pushed towards those cameras with fast eye wateringly expensive fast primes. I digress. It is possible to shoot moving subjects with manual focus lenses and the A7r. At a recent Medieval Fayre I was able to shoot some action sequences of mounted archers and re-enactments of combat using a mixture and sometimes a combination of pre-focusing and follow focus. Stopping down to f5.6 and f8 gave a little leeway with focusing and smooth focusing action definitely helped. The whole experience of going out with a camera, two small lenses (the other was Voigtländer 15mm f4.5 Super Wide-Heliar), a couple of batteries, and an extra memory card was extremely liberating and made the whole experience fun.
The Voigtländer 75mm f2.5 Color-Heliar is not a sexy fast aperture lens and this is why it was replaced by the 75mm f1.8 Heliar Classic. Consequently it is ignored by many people which is a great shame as it is a very well made and well performing short telephoto lens. If you like candid portraiture then it is a no-brainer.