Handheld UV kit version 2
Posted 11 May 2012 - 21:24
Thought I'd share my updated handheld UV kit. This has changed since the last time as I've found an autofocus lens (Sony 30mm f2.8 DT SAM - 6e/5g) which transmits deeper into UV than the previous lens (Sony E mount 30mm f3.5 macro - 7e/6g). This is mounted on the LA-EA1 adapter to allow autofocus with alpha mount lenses (although at present it does not as the firmware needs to be updated).
The mount has changed as well, comprising an L-bracket with the Sony Nex-5N mounted onto the longer part of this bracket and the Vivitar 285 flash mounted on the shorter segment. The handle is actually a Manfrotto 155 video hand grip, with a bike torch holder at the end of it to hold my Nichia-chip UV torch. The torch allows for good lighting for autofocus UV. Interestingly the alpha lens remains wide-open until the photo is taken which allows for a very bright image to be visible on the liveview screen at all times, which aids autofocusing.
Another front view - different angle
The rig is held by the Manfrotto handle as you would a video camera, so is rather easy to carry around. No PVC tape to keep things mounted.
When my new bracket arrives, I will try and mount with 2 Vivitar flashes (one on each side) for more even lighting.
Posted 11 May 2012 - 21:28
This is the Sony cover with a Hoya UV filter.
Posted 11 May 2012 - 21:51
Edited by kds315, 11 May 2012 - 21:52 .
"Seize the day"
Posted 11 May 2012 - 21:52
Posted 11 May 2012 - 22:07
Posted 11 May 2012 - 22:17
Posted 11 May 2012 - 22:26
Posted 11 May 2012 - 22:36
On a personal note, I would like a better way of focusing than using the rear monitor - my eyes cannot standing use such contraptions. Even an EVF is way better. Hopefully the Sony has an EVF add-on?
Posted 11 May 2012 - 23:07
The only Nex camera which has both a hotshoe and built-in EVF is the Nex-7, which I won't mod unless a full-frame Nex camera is released.
Just tried with the UV-Zeiss Jena and focus confirmation is not as easy with the Sony 30mm macro lens, as I adjust focus at f16 with the UV-Zeiss; the Sony lens will stop down at point of shooting, so focus confirmation is done at f2.8..
Posted 12 May 2012 - 05:59
Did You already order the NEX hotshoe adapter or not? To connect the flash directly to the camera?
On a personal note - I find it difficult to use NEX-5N handheld mainly because of the absence of the viewfinder. It might be the only reason I still have a DSLR for infrared use. But on the tripod for me it is a totally different thing.
Posted 12 May 2012 - 08:02
If you're lucky enough to have a quality UV lens like the Zeiss 60, by all means use it. (I use the Coastal 60/4 on my GH-2 all the time. A perfect combination for handheld UV captures with flash). Andrea brought the UV Zeiss on our recent Desert trip and captured excellent UV images with it. From what I saw it's worth the money.
Boon is using the Zeiss Jena 4/60mm UV-Objektiv whereas Andrea has the Zeiss UV-Planar 4/60mm (she has from me) - two very different lenses, as the latter has no focus shift and was made for the the UV reproduction of finest microstructures, but the former is not corrected for focus shift. Both however transmit to about 300nm.
Edited by kds315, 12 May 2012 - 08:06 .
"Seize the day"
Posted 12 May 2012 - 08:09
I don't think the local garden centre will take it well if I go in and mount a tripod to shoot photos of their flower. This rig should allow me to have a small but effective means to analyse the UV pattern and decide which is worth bringing home. But having said that, the ultimate would be to have a setup using the Zeiss 60, my Quantum flash (either the T5DR or the even stronger X2), which isn't exactly very portable.
What I did notice is that the Sony E mount lenses do stop down in real time which can make autofocus rather difficult (partly because they let less UV light through), whereas the alpha mount lenses only stop down when you shoot, which makes the images really bright (f2. and easier for autofocus or even manual focusing. With handheld, it would be difficult to focus with the Zeiss 60 wide open and then stop down as the plane of focus may have shifted from the movement, hence focusing fully stopped down; but I have to say that the Nichia torch lights it very well so even at f16 the images on the liveview are still very bright.
Posted 14 May 2012 - 21:26
Posted 16 May 2012 - 20:48
I wish I had the Olympus OM-D with its image stabiliser.
Here's one for the road.
Posted 18 May 2012 - 00:44
Posted 18 May 2012 - 12:11
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