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Road to perfection : Voigtlander Ultron 75mm F1.9 SC Leica M mount

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A modern, fast 75mm lens with a vintage feel in Leica M mount. This lens is only slightly heavier than the Heliar 75mm f/2.5, yet it is nearly one stop faster. Table Of Contents ✓ Lens Version There are two versions of this lens. One is MC (Multi Coated) with a matte black finish and one is SC (Single Coated) with a black paint finish. The lens being reviewed is the SC version. Lens Specifications Mount: M-Mount (VM) Focal length: 75 mm Aperture: f/1.9-16 Optical construction: 7e/5g Aperture blades: 12 Minimum focusing distance: 0.5m Weight: 290g Filter size: 49mm Handling The focus ring operates smoothly and is well damped. The aperture ring clicks with half-stop clicks. Build quality is excellent. Lens Sharpness On a Sony A7RII, this lens shows pretty good resolution from wide open at the center. To get corner-to-corner sharpness on the A7RII at far distance, it will require stopping down to f/4 to f/5.6. At close distance, this lens becomes softer than at portrait distance. Voig...
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Tele- or not tele: Enna Tele-Ennalyt 90mm f/2.8

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  Table Of Contents ✓ Lens Version The lens can be divided into two different major versions: Version 1: Wide white bands and narrowly banded black bands on the aperture and focus ring. Serial Number <4,000,000. Version 2: Narrow black and white bands on the aperture and focus ring. It is also available in Enna "Sockel" mount. Serial Number >=4,000,000. Tele or not tele? For photography lenses, a telephoto lens has a focal length larger than the Total Track Length (TTL), where TTL is the distance from the surface of the sensor to the top of the lens. Enna adds “tele” before the name Ennalyt to indicate a telephoto lens. For example, Enna Tele-Ennalyt 90mm f/2.8(Ernostar design) is a telephoto lens while the Ennalyt 95mm f/2.8 & 100mm f/2.8(Triplet design) is a long-focus lens. Photo taken by Dr. Klaus D. Schmitt, remixed by Calvin Lens Specifications of the lens reviewed Lens mount: M42 (also available in Exakta mount) Focal length: 90mm Aperture adjustment: f/2....
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One of a Kind: The Nikon EL-Nikkor 50mm f/2.8 Enlarger

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This is a 6 elements in 4 groups enlarger made by Nikon since the mid-50s. The design of this lens is pretty uncommon: the front part is a 1/2 double gauss while the rear part is a 1/2 plasmat.The reason for such design is mentioned on Nikon website: During development of the lens, a German optical manufacturer secured the patent for its basic design. Nikon (formerly Nippon Kogaku K.K.) was forced to incorporate methods that did not violate this patent into its design. There were numerous restrictions to overcome before Nikon could complete its optical system. At wide open, the lens is not as sharp as I expected. Stopping it down to F4, the overall contrast is improved significantly. Here is a sample taken 2-3 meters apart at wide open and at F4. EL-Nikkor 50mm f/2.8 @F2.8 EL-Nikkor 50mm f/2.8 @F4 Since this lens features straight aperture blades, it is expected the sunstar will be nicely defined when stopped down. The lens also works well as a landscape lens when stopped down to F...
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The wrong way to use an enlarger: Fujinon-EX 50mm f/2.8

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This is a 6 elements in 4 groups double Gauss enlarger made by Fuji Photo Optical since the mid-80s. Let’s see how it performs on a Sony A7RII. The lens claimed to be having corner to corner sharpness by Fuji. Here is a sample taken 2-3 meters apart. It seems the claim is true: the low left corner is pretty decent at wide open. When stopped down to about f/5.6, it shows pretty decent performance as a landscape lens. Since this lens features straight aperture blades, it is expected the sunstars will be nicely defined when stopped down.  This lens is well-corrected for spherical aberration. There are minor bright edges on the rear bokeh on the samples here, which suggests the lens is slightly over-corrected when used at low image magnification. Here are some samples taken at medium distance. Although this lens are coated with Electron Beam Coating, there will be some venting flares on the photos due to light leak on the lens mount. Since this lens is not designed to use in outdoor, a...
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Street photography with Canon 35mm f/1.5 LTM

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