Add-on Review of the Voigtlander Heliar 40mm f/2.8 on the Sony A7II
by Brad Husick
Recently Steve Huff wrote an extensive review of the Voigtlander Heliar 40mm f/2.8 on the Sony A7S. Rather than repeat his conclusions, with which I agree, my intent here is to add on to his review by shooting the lens on the Sony A7II.
The photos here were taken at ISO 100, RAW, auto-exposure. The lens does not communicate aperture to the camera. They were opened in Adobe Lightroom 5.7.1 with Camera Raw 8.8. No adjustments were made in Lightroom. In the first series across the lake, the images were shot at f/2.8, 4, 5.6, 8, 11,16, 22. In all the subsequent series the images were captured at f/2.8, 5.6, 11, 22. In each case you first see the entire frame at f/2.8 followed by 100% crops.
The lens displays some interesting characteristics. There is vignetting when wide open at f/2.8 but not severe. The camera chooses an exposure for f/2.8 that is different from all the stopped down exposures and you can see this in the crops. I did not adjust for this in Lightroom so that you could see the effect.
Also when wide open the focus plane is not uniform across the image when focused on infinity. There are some areas in focus and some out of focus as you travel across the image from left to right. This variation settles down as you stop down the lens, nearly disappearing by the time you get to f/8. This behavior is far less obvious when focusing on closer subjects.
By the time you stop down to the lens’ limit of f/22 you have passed the diffraction limit of the sensor. Without going into gory technical detail, the final image degrades at f/22 so you’re better off limiting yourself to f/16 or so. The lens does not have click stops in the aperture ring, so you can stop anywhere you like. It does have a tendency to move rather freely, so check each time when shooting.
Overall the lens produces lovely images and is about as compact as a lens could possibly be. Build quality is superb and typical for Voigtlander. The nickel finish adds a nice retro look to the camera. I shot all of these images in overcast / light rain conditions with the small built-in hood rather than the longer metal hood and lens cap provided with the lens. My objective was to keep the package as small as possible since that’s one of the key selling features of this lens. If you own the Voigtlander VM-E Close Focus Adapter for the Sony E mount (which you really should own as it is superb) then adding the Voigtlander Heliar 40mm f/2.8 lens should be a natural addition for your setup. You can almost stick the Sony A7II with the collapsed Heliar in a jacket pocket. Note: the lens REQUIRES the aforementioned adapter to enable focusing and it will not function properly without such an adapter.
Thank you to Stephen Gandy of CameraQuest.com for instantly loaning me the lens for review. He’s the best source for Voigtlander and always provides the best customer service. Shop there with confidence.
The case in the photos is the Angelo Pelle leather half case for the A7II.
ALL IMAGES BELOW should be CLICKED on to see them the right way. Details are on the photos upper left text