If you have an old second hand lens and you are unsure of the camera it was made for, take all the known details of the lens and search the web.

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Mounted lensnikon

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Lensmount index

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Because you need to use your camera in full manual mode, you may need to familiarise yourself with this before shooting. You’ll soon work out which lenses you enjoy using with your camera. Analogue lenses can provide professional quality glass at a fraction of the cost of modern lenses so lens adapters can help you shoot with better lenses for less.

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CameraLensMount Adapter

Mounted lensfor photography

Since all our adapters are fully manual, you need to change your camera settings to manual before you start shooting. This is because a lens adapter doesn’t enable electronic communication to pass from the lens to the camera. You need to manually set your exposure and focus. If your lens does not have a manual aperture control ring, it will stop down to its smallest f-stop by default.

Urth lens mount adapters are made from premium materials and are guaranteed for life. Our consciously designed lens adapters are made for the world’s best cameras and lenses. Our low-impact designs offer professional quality at an affordable price. Our lens mount adapters allow you to use third-party and vintage lenses with your ... Read more Read less

A quick internet search of the camera model followed by lens mount is the quickest way to confirm your camera’s lens mount. E.g. If you have a Sony A7r, a quick search shows it has a Sony E-mount.

Urth lens mount adapters are made from premium materials and are guaranteed for life. Our consciously designed lens adapters are made for the world’s best cameras and lenses. Our low-impact designs offer professional quality at an affordable price. Our lens mount adapters allow you to use third-party and vintage lenses with your camera. Expand your lens options and explore your creativity with our premium lens mount adapters. Made from hardened magnalium, our lens adapters provide a snug fit and easy mounting so you can quickly and easily change lenses. Each adapter plants 1 tree so future generations can enjoy nature as much as we do now. Read more Read less

Lensmount types

Cameralensmount chart

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What is seldom taken into consideration is lens material and Abbe value. At one point Abbe value and chromatic aberration was a big thing. Improvements in polycarbonate and introduction of better high index monomers have made things somewhat better but chromatic aberration can still be an issue for some.Abbe value of the lens material, Rx, where the patient is looking through the lens, and the distance from the object being viewed all play a part in creating chromatic aberration. To correct vision the ophthalmic lens bends light by slowing it down. Each color (wavelength) of light will bend differently while passing through a lens material. There are three different color wavelengths: yellow-green, blue, and red. The standardization for our industry uses the yellow-green (587.56 nm) for measuring lens power. This keeps us all in agreement when measuring the power of the lens.Here is the issue - when checking the power of a +5.00 we will get a +5.00 with our yellow-green calibrated equipment, but in the blue light spectrum it will read a little higher and in the red spectrum it will read a little lower. This power difference between red and blue light is know as “dioptric spread.”To determine the dioptric spread of any lens material simply divide the power of the lens by the Abbe value of the material. Example - +6.00 lens in poly (Abbe of 30) will have a dioptric spread of 6 ÷ 30 or 0.2 diopters. The dioptric spread will range from +6.10 for blue light to +5.90 for red light.

The easiest way to find and confirm your lens mount is to know the mount of the camera it was used on originally. A quick internet search of the camera model followed by lens mount is a sure way to confirm what lens mount you need. For example if you have an old Nikon lens and you know it was used on a Nikon FM2, you can easily find that the lens has a Nikon F-mount. This is particularly useful for lenses that are made for different mounts i.e Sigma and Tamron bring out the same lens with different mounts including EF, F, E so knowing the camera the lens was used on is a good shortcut.

C-MountLens

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There are countless creative experiments to be explored by mixing different brands of lenses with your camera body. Lens adapters can also help your existing collection of lenses go further with any new cameras you collect. So you can invest in a new camera and make the most of your favourite lenses.

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Attach the lens to the female end of your lens adapter by aligning the red dots located at the rear of the lens with the one at the edge of the adapter ring. Screw in your lens until it clicks or is fastened securely and be sure not to over tighten. Then insert the male end of the adapter to the camera body, by aligning the red dots of your adapter ring and camera body and rotating the adapter until you hear a click – usually in a clockwise direction. Be sure to check everything is firmly attached before picking up the camera to start shooting.

Partnering with a local Australian archival framer, Urth Art prints are framed with sustainably sourced timber to display the artwork, without damaging the environment. And to bring the gallery experience home, Urth Art prints are protected by art-grade acrylic glazing that prevents fading and discolouration.

You are probably wondering if this range of powers will cause your patients any problems. Usually not- as long as your patient is looking through the optical center of the lens. When looking through the OC the image difference is stacked directly in front of and behind one another. When looking at the same object out of the optical center is where issues could occur. The stacked images are displaced by differing amounts, kind of like a deck of cards spread across a table. This will result in a rainbow of blur or chromatic aberration. The width of this rainbow (how far the deck of cards is spread) is related to the Abbe value and the prism powers for the various wavelengths as determined by Prentice's Law. The higher the Abbe value, the closer together the color fringes are. That is why a higher percentage of patients have issues with chromatic aberration in poly (Abbe of 30) than with CR39 (Abbe value of 58).Does all of this really matter? The simple answer is yes, sometimes. Higher power prescription in lower Abbe lens materials will have a higher chance of issues with chromatic aberration. The catch here is that higher powers greatly benefit from higher index lenses with lower Abbe values.Do not let the fear of chromatic aberration keep you from dispensing poly and high index lenses. We sell hundreds of poly jobs a day with almost no issues reported. Just keep in mind that when that rare patient comes in complaining of images not being clear in the distance or having a rainbow effect when looking outside of the OC, it could be chromatic aberration. The simple fix could be changing lens material to something with a higher Abbe value. I hope that this has been a good reminder for you that you can add to your troubleshooting tool bag.

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The other day I had the pleasure of reading a very good article featured in 20/20 written by Palmer R. Cook, OD. He dug very deep into Chromatic Aberration and the effects it has on patients. Part of my job here at IcareLabs is assisting our customers with trouble shooting problem patients. Often the issue is clarity or blur when not looking through the optical center. Lenses work great while looking straight ahead but with even minimal eye movement the clarity goes away. We always look at Rx, base curve, and lens design. This is the lowest hanging fruit.

A lens adapter allows you to attach a different brand of lens to your camera body, letting you use an otherwise incompatible lens with your camera.

Attach your lens to the adapter, and then your adapter to your camera body. Put all settings on your lens and camera into manual mode, and select ‘shoot without lens’ in your camera settings.

Mounted lenscanon

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James joined IcareLabs in 2005. He has over 35 years of optical experience and is an ABO Certified Optician. James is our go-to optical expert and loves to share his knowledge with customers. He also leads our sales and marketing team. In his free time, you'll find James enjoying the outdoors with is family; especially hunting or fishing. James' blogs have had over 100,000 views.

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