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2019

A walk with a 25mm CCTV Lens

An afternoon walk, this time with a 25mm f/1.4 CCTV lens adapted to fit a mirrorless camera. I quickly discovered that the lens has to be used wide open, when I stopped it down I could see it vignetting badly in the camera viewfinder. It still vignettes a little wide open and as the image circle produced by the lens barely covers the sensor there can be some interesting swirling around the edges of the frame.

Soon after discovering that the lens needs to be kept wide open the focusing mechanism started playing up. Initially the focusing appeared to be jammed, once I got the focusing collar to turn the lens would focus on close subjects but wouldn’t focus on distant subjects.

I continued on my walk as my testing was going to be mostly close subjects. When I got home from the walk I got the focusing mechanism working and think that I have managed to fix it.

Some interesting variegated Hosta leaves. One of the first shots taken with the lens before the focusing mechanism started playing up. The edges of the frame don’t show much swirling in this shot.

Interesting variegated Hosta leaves.

Ivy leaves on a tree trunk. The swirling around the edges of the photo is really noticeable in this shot.

Swirling around the edges.

Categories
Monochrome Monday

Monochrome variegated leaves.

Monochrome Monday travels back a couple of weeks to one of my early walks testing lenses adapted to a mirrorless camera.

These interesting variegated leaves were taken on the second outing with a 35mm f/1.7 CCTV lens and was one of the shots that made me decide try a couple more CCTV lenses. Going by my minimal notes the lens was stopped down just a little to around f/2.

Variegated leaves in monochrome.

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Cosmic Photo Challenge

Cosmic Photo Challenge: Independent Lenses in Various States.

This is my contribution to the Cosmic Photo Challenge: A State of Independence.

My first thought was a selection of juvenile birds that were independent of the adults when the photos were taken. That idea was quickly followed by the fact that this is the Canada Day long weekend so I considered a Canada Day post.

Then I thought about an ongoing project, testing a variety of lenses on a modern mirrorless camera. Most of the lenses I have tested so far are (or were) made by independent lens makers. Companies that make lenses to fit other makers cameras.

Some of the lenses are in a bit of a state through heavy use or being designed to be almost disposable. Which is why I titled the post “Independent Lenses in Various States” as a rewording of the challenge.

To the lenses.

A Periwinkle flower photographed with a 35mm f/1.7 CCTV lens adapted to fit an Olympus mirrorless camera. Shot with the lens wide open at f/1.7.

This was the first CCTV lens I purchased and I found it interesting enough to purchase a couple more. They’re also known as C-mount lenses having a screw mount for attaching to CCTV cameras with the appropriate mount.

Some of these CCTV lens are very cheap. I wonder if they’re designed to be almost disposable, used where or when a lens could get damaged somehow. The lens was $38 CAD including shipping, the adapter to fit it to the camera and two extension tubes to go between the lens and the camera to allow it to focus on closer subjects.

A Single Blue Flower.

Ivy growing up a tree trunk with a 25mm f/1.4 CCTV lens. This is one of the lenses I ordered after experimenting with the 35mm CCTV lens used for the Periwinkle flower above.

Stopping the lens down from maximum aperture causes severe vignetting so this was shot with the lens wide open at f/1.4. Wide open the lens still vignettes a bit and as the image circle produced by the lens barely covers the sensor there’s some interesting swirling around the edges of the photo.

I have already had to repair the focusing mechanism on the lens after it first jammed and then stopped focussing on distant subjects. That probably explains why the lens cost $36 CAD including shipping and the adapter to fit it to the camera.

Swirling around the edges.

Last years seed pods and new leaves with a 50mm f/1.4 CCTV lens. Shot wide open at f/1.4. This was the other CCTV lens I ordered after experimenting with the 35mm CCTV lens.

Surprisingly good performance for $41 CAD including shipping and the adapter to fit it to the camera. So I’m finding it a bit disappointing so far.

Fresh growth and seed pods.

A Bracken frond taken with a Vivitar 35mm f/1.9 lens I purchased used in the 1970s. Shot wide open at f/1.9. At the time Vivitar were a U.S. brand who designed lenses that were then manufactured by various Japanese lens makers.

The same design was built with a variety of camera mounts allowing the lens to fit a wide range of camera bodies.

I have given this lens a hard life over the years and it now feels like it could fall apart each time I use it.

Bracken frond with an adapted lens from the 1970s.

Dandelion clocks (seed heads) with a “silvernose” Olympus OM Zuiko 50mm f/1.8 lens I purchased in 1976. As with the other shots this was taken with the lens wide open, in this case f/1.8.

I don’t know if it can be classed as an independent lens. It wasn’t designed for the camera being used and requires an adapter but both the lens and camera were made by Olympus.

The silvernose refers to a polished aluminium ring on the front of the lens and signifies that it is one of the early Olympus OM Zuiko lenses. This is another lens that has had a hard life. It has been dropped a few times and was once bounced along the gutter of Charing Cross Road while attached to my Olympus OM1 when it slipped from my shoulder as I ran for the last tube train of the night. A few years later it was being dried out in an oven after being submerged in Georgian Bay.

Dandelion seed heads.

Categories
2019

An afternoon walk, 25th June

Another afternoon walk after physiotherapy in the morning and another opportunity to test an old film camera lens adapted to fit a mirrorless digital camera.

This time it was a Vivitar 35mm f/1.9 lens I purchased used in the 1970s. The lens has had a hard life, in the late 1980s it spend several springs attached to the back of various nestboxes while I documented the nesting cycles of various bird species. As a result it feels as if it could fall apart each time I use it.

A Bracken frond with the lens wide open at f/1.9. The out of focus dirt and rocks under the frond have an interesting rendering with the wide open lens.

Bracken frond with an adapted lens from the 1970s.

Orange Lichen and green moss on a boulder with the lens wide open again I think. I tried to keep the aperture wide open as much as possible on the walk but as it’s an adapted lens there’s no communication with the camera so no lens settings are recorded.

Green moss and orange Lichen.

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Silent Sunday

Silent Sunday: 23rd June 2019

Bracken with adapted CCTV lens.

Categories
2019

An afternoon walk, 18th June

I have physiotherapy on Tuesday and Friday mornings. As the weather was nice I decided to go for a walk with the camera on Tuesday afternoon to continue exercising my leg and arm.

For the walk I used my oldest lens, an Olympus OM Zuiko 50mm f/1.8 I purchased with an Olympus OM1 in 1976. I also decided to keep the lens set at its maximum aperture, f/1.8, for all the shots.

The lens is one of the early OM system lenses know as silvernose (or silver nose depending on the reference) because they have a shiny brushed aluminium front on the filter mount. They’re often single coated rather than the multi coating used on modern lenses. My copy of the lens has had a hard life over the years, it was once submerged in Georgian Bay and dried out in an oven.

Some interesting variegated Hosta leaves.

Some variegated leaves in the spring.

A small group of Dandelion seed heads. I didn’t spot the falling seed until I posted the photo on Instagram a day later.

Dandelion seed heads.

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Wordless Wednesday

Wordless Wednesday #54

Green spring leaves.