Tag Archives: DIY lens

Bubble shooting

Bubble shooting

Dukane 3" f2.5 projector lens + DIY fit using M42 adapter.

Bought this lens inspired by the artistic weird bokeh www.flickr.com/photos/123514180@N06/15472652864/. Was taken by surprise when I looked through the view finder first time; same bubble bokeh effect as noticed in trioplan and diaplan! Subject IQ is less but Bokeh IQ is wonderful!

If you’re into DIY lens experiments and love bokeh, give it a try. I think world hasn’t woken up to this lens yet for it’s bokeh character. Costs $10. Not just bubble bokeh, lens goes crazy when put on extension tubes. The artistic lens in my collection as of today.

BTW, it’s a projection lens. No aperture and focusing. Need to control light using exposure time – 2500th of a sec. High speed photography ? :)

Tagged: , Dukane , 3inch , f2.5 , Dukane 3inch f2.5 , Prime , vintage , bokeh , circle bokeh , projector lens , manual lens , DIY lens , DIY , M42 , Trioplan , Diaplan , Pentacon AV , Trioplan alternate , Diaplan alternate , US made , 3 , 60D , EOS , Canon

DIY Monocle Test shot

DIY Monocle Test shot

Graflex Anniversary Speed Graphic + DIY Monocle ~135mm/~f3 + Agfa Ortho CP-GU XRay film in D-76 stock for 7 min

Tagged: , diy , diy lens , handmade , monocle , single , film , xray , Agfa , Orhto , cp-gu , D-76 , selfdeveloped , LF , large , format , large format , 4×5 , BW , Black&White , Monochrome , aberrations , glow , soft , meniscus , banana , nectarine , still life , scanned , Canon , 8800f

Linhof Schneider 105/3.5 DIY adaptor P8032518

Linhof Schneider 105/3.5 DIY adaptor P8032518

Setup line array test system.
New DIY lens adaptor for the line array TSL202R module. I found an old Schneider 105/3.5 lens with broken shutter. I have removed the front and back lens part and put a new adaptor between the 2 lens parts. Both lens have an thread of 29.5×0.5mm, so I have to make the inside thread on the lathe, a precise task! At the end I have made a Nikon F-mount to put the hole lens on my standaard Nikon interface.
To control the correct focus, the adaptor can shift 50 mm in and out the F-mount adaptor. This works nice for the min and max work distance of the Nikon cameras. The lens has a F 3.5 and the signals on the TSL202R array are nice.
For the results of the tests see:

www.flickr.com/photos/fotoopa_hs/7703776144/

Now a green 10 mW laserpointer is used instead of the red 1 mW pointer. The integration time here is 71.3 us. If need I can use a shorter time as long as the ambient light is not to high, there is no problem. The green laser gives much more output despite he is not optimal in the pass band from the TSL202R line array sensor.

Test results:

Depth resolution 1 pixel array shift = 0.416mm object change in depth at 600mm distance ( D300 camera sensor distance). D300 Camera frame = 82 mm.

DOF at 600mm, Macro lens AF105/2.8D, F18 = 19.4 mm = 46 array pixels
The TSL202R line array is 128 pixels. This means that any signal from -23 to +23 pixels from the centre may give detection, or in focus pictures. A very nice range for detection.
This means also, I can readout the other pixels at a higher data rate as I do no make the ADC convertion (take most time) due to the fact that they are out focus. Just in case of focus detection no speed or direction. ( The max speed is only need if the ambient light is very high so the line array readout a to high level from direct sunlight. I have to test this level next days but just now at 71 us integration time the level seens to be very low.
This primair algorithme is very easy to implement as first test. just look if any readout into the DOF range zone to trigger the cameras.

Frame………….. Distance object …… Distance line sensor.
125mm —————– 650 mm…………..68 mm
80 mm —————— 520 mm…………..70 mm
70 mm —————— 445 mm ………….73 mm
60 mm —————— 390 mm…………..77 mm
50 mm —————— 315 mm…………..81 mm
40 mm —————— 260 mm…………..84 mm
30 mm —————— 205 mm…………..91 mm
20 mm —————— 153 mm…………105mm
15 mm —————— 130 mm…………120 mm
14 mm —————— 125 mm…………124 mm
The distance to the line sensor is with only 1 part of the linhof 105mm lens. The frontside part is removed to optimalize the workings distance.

There is a new linsensor inuse now:
www.flickr.com/photos/fotoopa_hs/8145513852/
www.flickr.com/photos/fotoopa_hs/8147506070/
www.flickr.com/photos/fotoopa_hs/8145513146/

The new controller boards are here:
www.flickr.com/photos/fotoopa_hs/8295202986/

Tagged: , linhof , schneider , TSL202R , fotoopa , Nikon , F-mount , detector , high-speed , macro , macro-lens , DIY lens , Schneider lens , Schneider 105-3.5 , Schneider to Nikon , Linhof lens , Linhof 105mm lens , Linhof 105mm lens to Nikon , DIY 105mm lens , optical detector , 3D MACRO , 3D photography , 3D insects , 3D in flight , 3D beelden , 3D fotografie , 3D photo , highspeed macro , high-speed capture , high speed laser detector , highspeed photography , high speed shutter , high-speed hardware , highspeed detector , flying high speed insects , D300 high speed

DIY EF Lens: ~30mm ~f/2.2 fixed aperture

DIY EF Lens: ~30mm ~f/2.2 fixed aperture

I started with this article by johnnyoptic on diyphotography.net. As suggested, I bought some lenses from www.surplusshed.com. I also picked up various sizes of PVC connectors from Home Depot. Finally, I ordered an M42-to-EF adapter from eBay (because M42 was the cheapest EF adapter I could find), and some JB Weld epoxy.

I considered cutting up a spare body cap instead of using the M42 adapter, but the adapter has the advantage of locking into place like a real lens. Also, the 42mm diameter of the M42 threads is conveniently close to 1 1/2 inches, the diameter of the PVC.

Eventually I arrived a combination of lenses and PVC that seemed like it would work. I confirmed exact positioning by wedging the lenses in place using tissue paper. Once I was sure of where everything should go, I blacked the insides of the PVC with a sharpie (too shiny, as it turns out) and epoxied everything in place.

Once assembled, I took some test shots and figured out the focal length and aperture. I was hoping for an oddball focal length — 30mm is a bit disappointing, as I already had a 30mm prime. I could have checked this before any epoxying, but I didn’t think to.

There is some slight vignetting, and I’m pretty sure it’s caused by the extra PVC at the front of the lens. I could cut that off, but I don’t care enough to bother. Also, I think I’d see better contrast in the photos if painted the inside with a flat black paint.

I’m looking for suggestions on how to decorate the outside. Maybe a red "L" ring for starters?

Tagged: , diy lens , pvc , diypfav

DIY wide angle lens DIY Bathroom

DIY wide angle lens

Instead of working like I should I built an almost-fisheye lens for my camera.

I’ve been dreaming of a fisheye lens for some time. However, I am poor. Today I found this Flickr group. Then this tutorial. While I started planning to go to the local Conrad hardware store to pick up a "Türspion", I found this tutorial

I had some scrap glasses lying around, but unfortunately I am nearsighted, not farsighted. But maybe my glasses would also make a nice effect? I tore apart the glasses and taped together the two lenses with masking tape, then mounted them on a toilet paper roll that fit nicely onto my camera’s lens, and here is the result. I guess it’s more wide angle than fisheye, but it has some nice bulging distortion.

Tagged: , black , piggy , DIY lens