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Posts Tagged ‘flash’

Flashbulbs

August 5th, 2010 No comments

A while back, I bought a Conway Synchronised box camera which came with a Coro Flash included. More recently I managed to get hold of some flash bulbs for it, but had trouble using them.

Using a multimeter and some paperclips I tested each stage of the flashgun and the synchronised trigger mechanism in the camera and found that each stage of the system worked in isolation, but still no joy taking photographs with a flash. I think some of the connections were a bit loose due to corrosion.

I took the (very simple) flashgun apart and washed all of its copper connectors in spirit vinegar to make them red and shiny again. Most importantly, I found it was necessary to scratch the corrosion off the contacts of each bulb before use, using the handle of a teaspoon or similar.

Now I can enjoy reasonably reliable retro flash photography, using Philips Photoflux PF1b flashbulbs. They’re quite expensive but I bought 15 bulbs from eBay for about a tenner. They’re good fun to simulate “proper” retro photography.

A note to anyone who is old enough to remember this stuff from first time round: Sorry for being so excited about obsolete technology. I’m just discovering this stuff for myself and I think it’s great! :D

Categories: Photography Tags: , , , ,

Audioboo

July 28th, 2010 No comments

I heard about Audioboo – a sort of Youtube for audio clips – the other day on BBC Click. I decided to give it a go, since I fairly often embed audio clips in my blog, simply by hosting and linking to MP3s and letting the user’s browser handle the playback. This doesn’t always work out for the best.

So here’s my first attempt at uploading content to Audioboo and embedding it in my blog.

Categories: Audio, Web Tags: , , , ,

New camera: Coronet Conway Synchronised

June 18th, 2010 3 comments

For some time now I’ve been wanting to get into medium format photography. I have the right developing stuff to process the films myself, but unfortunately no way of scanning the negatives without buying a flat-bed scanner. But my colleague Paul offered to scan 120 roll film if I processed it first. With this barrier removed, I decided to give it a go.

Many of the readily-available 120-format cameras are so-called “toy cameras” such as the Holga and Diana. I wasn’t interested in modern(ish) toy cameras, and instead looked for anything old and inexpensive.

Eventually I bought a Coronet Conway Synchronised: a cheap 1950s box camera, made in Birmingham. I was drawn to it because it came in its original box with manual, paperwork, and a parabolic flashgun.

Coronet Conway Synchronised

It’s extremely crude, with a fixed aperture and fixed shutter speed at approximately 1/30s (or bulb mode). The lens is fixed-focus from 9 feet to infinity, with a small lever to snap it into “close up” mode – 4 to 9 feet.

What this means is there’s no metering or manual control of any sort. The only control I have over exposure is the choice of film speed. There’s no guidance in the user manual on which film speed to use, so I’ve gone with a fast film – some Ilford HP5+ 400.

I mentioned this camera came with a flashgun, the Coro Flash. It takes bayonet-type single-use flash bulbs like the PF3N. These are almost impossible to come by these days, but fortunately I found that the PF1 with an adapter will fit. PF1 bulbs are somewhat easier to find on eBay, so I’ve ordered a box of 15 and will try my hand at dangerous indoor photography :)

Conway Synchronised with Coro Flash

I shot a roll of any old rubbish, just to test the camera and see if the film was a good match. Turns out the exposure was almost spot-on every time, in a variety of lighting situations, so I’m very pleased. Unfortunately, in my confusion in loading the film I didn’t line up the right set of numbers with the little window on the back of the camera.

The camera is supposed to be wound on 9cm after each photo: by following the numbers, I was winding it on 6cm. The photos are all overlapping. But it has probably worked out for the best. I’ve ended up with a long, blended patchwork panorama of what was otherwise a set of garbage test shots.

Like I said, I don’t have any way of scanning these photos and I’m not about to ask Paul to waste his  time scanning the results of my partially failed experiment. I found a sort of workaround, by attaching the film to my computer screens, bringing up a white page, taking photos on my DSLR, and stitching them together with Hugin. The photos and the stitching are pretty bad, but you get the idea.

How to scan 120 roll film

You can click this preview for a bigger version. As far as I can make out, from left to right, you can see:

  • Two waterfalls in Brandon Hill park
  • Two shots of Cabot Tower, also in Brandon Hill park
  • My friend Nathan on a bench
  • Cabot Tower again
  • Nathan again
  • A leafy landscape
  • A shot over University Hall at Stoke Bishop (with the frames of my screens through it)
  • A long-shutter picture of a car driving past my balcony at night
  • My friends around my table
  • A car in the car park
  • Hana in the car park
  • Two views from my balcony – one portrait, and one landscape

A roll of 120 format film

As you can see, it’s a “disaster” in terms of producing good photos, but I rather like the effect of a mixture of memories from throughout the week. The frames of my monitors doesn’t help, but I might give this technique another go, using my TV screen :D

Categories: Photography Tags: , , , , , , , ,

Meltdown

July 8th, 2009 1 comment

The title “On not buying cheap crap” was a close runner up for this article.

A few months ago I bought a set of flashes from eBay. The price was very low, and obviously I wasn’t expecting miracles. For around £130 I managed to get two 150W flashguns, two tripods, all the power and sync cables, wireless triggers, three photographic umbrellas, a softbox and a carry case. Delivered. Not bad!

The build quality of the kit isn’t brilliant, and would quickly break if I lugged it around everywhere like a pro. But it seemed fine for occasional home use and I’ve used the various pieces several times with good photographic results.

The other day I used one of the flashes with a snoot to take a series of smoke photos. I kept the 50W modelling lamp on so I could see what I was doing. After I finished taking the photos, I turned the flash off and went to bed. In the morning, the snoot (held onto the front of the flash by one bolt) had fallen off and was lying on the floor. I didn’t think anything of it until I inspected the flash.

It seems using the snoot had significantly reduced ventilation to the modelling lamp, causing it to get hot enough to soften the plastic. The weight of the snoot (hardly anything!) was apparently enough to cause the front of the flash to sag, where it has now set.

Two flashes and a snoot

Two flashes and a snoot

The snoot now doesn’t bolt onto the flash properly, so I will have to use it on the other flash. With great caution.

Lessons learnt

  • Don’t expect too much from cheap rubbish. By “too much”, I mean don’t expect it to stay as a solid during use.
  • Use the modelling light as little as possible when using a snoot.
  • If I ever build a hot light, I will not use thermo-softening materials.
Categories: Photography Tags: , ,