#Sony e mount fisheye manual

Imatest read the corners as 1.47 stops darker than the image centre. It can be cured in software.Īpochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.Įven with the fixed f/7.4 aperture, falloff of illumination towards the corners can be seen under certain conditions. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. Surprisingly, for a fisheye, chromatic aberrations are well controlled, with fringing only just exceeding half a pixel width towards the edges of the frame.Ĭhromatic aberration is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Simple.įor this review, the lens was tested on a Sony NEX-7 using Imatest. The taller the column, the better the lens performance. The scale on the left side is an indication of actual image resolution. Averaging them out gives the red weighted column. The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges. Unfortunately, getting this performance with any consistency can be difficult, which I suppose is all part of the fun? It could be that the sample provided has an issue with the focusing mechanism, so we may have to test another sample when we can to investigate that. Even so, it is capable of good sharpness across the frame. Images taken with this lens often display strange colour casts and have a 'toy lens' look to them. Luckily, due to the slow fixed aperture, the huge depth of field this lens provides can be very forgiving.ĭorr 12mm f/7.4 Fisheye Wide-Angle Performance The focusing ring travel way beyond this point, and I'd question the accuracy of the marked distance, as it seems way off in use. No minimum focus distance is specified for this lens and the only distance marked on the focus scale is half a metre. So long as suitable caution is taken, this can be avoided. Due to the positioning of the narrow focusing ring, and the shape of the hood, it can be very easy to let your finger slip into the view of the lens, marring the corner of images. A partial hood is built into the front of the lens which helps to protect the front element from bumps and scrapes. Even so, the lens is lightweight, tipping the scales at 220g and it balances well with the Sony NEX-7 camera used for testing.įocusing is performed internally, so the lens barrel does not extend during focusing.

#Sony e mount fisheye manual

The lens barrel and bayonet are constructed from metal and the narrow manual focus ring is silky-smooth in operation. In this review we'll take a look at how it performs.Īlso known as the Toda Seiko Diagonal Fisheye lens, and available in three versions, the version reviewed here is the 12mm version, with the following versions available:ĭorr Fisheye Lens, 12mm, f/7.4, 167 degrees, Mount: NEX / E, Fujifilm X, Canon EOS Mĭorr Fisheye Lens, 9.3mm, f/8.0, 168 degrees, Micro Four Thirds Mountĭorr Fisheye Lens, 7.5mm, f/8.0, 162 degrees, Nikon 1 Mountĭorr 12mm f/7.4 Fisheye Wide-Angle Handling and Featuresįor a lens pitching in at the budget end, build quality is very high. The lens is manual focus, has no aperture control and costs around £190.

Improper use of lens ring clamp may cause stress and damage to the lens.This basic fixed aperture fisheye lens for Sony E-mount cameras offers a very wide field of view of 167 degrees, with the barrel distortion effect you'd normally expect from a fisheye lens. Optional advanced rail stop to remember NPP setting.

Great for use on a monopod or high pole.

Arca Swiss Compatible quick release design, can be mounted directly to other Arca Swiss compatible systems without using R1 or R10.

Permanently mounted to lens, making reproducible mounting possible, and much quicker to set up.

Index marks for every 90 degrees in the front and every 30 degrees at the back for easy alignment of roll of lens.

Rolling the camera/lens in any position including the popular 0, 60 and 90 degree positions.

Mounted close to the camera to reduce stress on the lens due to gravity of camera body.

Large clamping area to reduce stress on the lens barrel, reducing the risk of damaging the lens.

It is contoured to fit the lens and hence increase area of contact.

Plastic insert is placed between the outer metal ring and the lens.

Fanotec lens ring clamps are built with special attention to the safety of the lens. Designed for use with the R1/R10 Pano Heads these lens ring clamps for fisheye lenses have become popular due to their compactness and ease of use.