jrovner Posted April 28, 2012 Share #1 Â Posted April 28, 2012 Advertisement (gone after registration) I will be shooting a wedding in a couple of months, and plan to use my 50mm Summilux and 21mm Super Elmar. I will need to swap these lenses in and out frequently. I will be doing this swapping outside without the benefit of a sensor blower, but it shouldn't be wet or especially dusty. Assuming I do the swapping quickly, and point the lens opening of the camera downward during the process, do you think I'll need to be especially concerned about sensor dust? Thanks very much for your advice. Link to post Share on other sites More sharing options...
Advertisement Posted April 28, 2012 Posted April 28, 2012 Hi jrovner, Take a look here Seeking advice about lens-swapping technique. I'm sure you'll find what you were looking for!
jaapv Posted April 28, 2012 Share #2 Â Posted April 28, 2012 No I don't think you'll have a problem - you should not collect dust that way, or very little. We should not exaggerate the importance of sensor dust. It can be a bit of a pita, but proper postprocessing techniques will get rid of it easily. Even cloning is fast and easy with Photohop's "content aware" technology. Â The shoot you describe calls for a second body for speed and flexibility, though. Can't you rent one? Link to post Share on other sites More sharing options...
SJP Posted April 28, 2012 Share #3 Â Posted April 28, 2012 Nope, should be fine, I would not fret about sensor dust on a single shoot anyway. If it is your livelihood then cleaning 1x per week should cover it (if at all necessary, just check a blue sky at f/16, no visible dust then leave the thing alone). Link to post Share on other sites More sharing options...
jrovner Posted April 28, 2012 Author Share #4 Â Posted April 28, 2012 Thanks very much for the quick help. Unfortunately, a rental isn't in the cards this time. This exercise should certainly speed up my swapping technique. I'm intrigued by Leica's lens holder (the gadget that adds an M mount to the camera's baseplate), but have read that it won't fit the M9. Link to post Share on other sites More sharing options...
jaapv Posted April 28, 2012 Share #5 Â Posted April 28, 2012 It won't fit the M9, but it is fairly unpractical anyway, as it unbalances the camera. Use a clean and soft shoulderbag or bumbag worn to the front ( for multiple lenses with divisions) to drop your lenses into without the lenscaps for fast swopping without dropping. Link to post Share on other sites More sharing options...
algrove Posted April 28, 2012 Share #6 Â Posted April 28, 2012 I have a bum bag like Jaap describes and it works fantastically just for the purpose you might need-fast lens swapping. Mine is a Think Tank model. I believe they make them in various sizes. Mine is the Speed Freak v2.0. It is well designed so you know it was designed by photographer. Link to post Share on other sites More sharing options...
peterbengtson Posted April 28, 2012 Share #7 Â Posted April 28, 2012 Advertisement (gone after registration) Thanks very much for the quick help. Unfortunately, a rental isn't in the cards this time. This exercise should certainly speed up my swapping technique. I'm intrigued by Leica's lens holder (the gadget that adds an M mount to the camera's baseplate), but have read that it won't fit the M9. Â I use the base plate lens holder from my film M on the M9. It does not sit exactly flush, mounts off center because the tripod hole location is different on the M9 and looks a bit ugly, but it works fine. Mounted to the left you can even use the lens as a handle. Link to post Share on other sites More sharing options...
jaapv Posted April 28, 2012 Share #8 Â Posted April 28, 2012 Yes- but you still need three hands for a quick lens swop. Link to post Share on other sites More sharing options...
NikonJeff Posted April 28, 2012 Share #9 Â Posted April 28, 2012 Jeff, Im a wedding photographer and shoot with a D3 and switch out lenses between a 35/1.4G, 50/1.4G and 85/1.4G using a Shootsac (Shootsac). The product has (3) primary lens compartment and (3) back-end flat compartments that do a great job at holding lenses and allows quick retrieval. The whole thing is made of neoprene like on a divers wetsuit so there is no need for caps (IMHO). Â When I went to Walt Disney World in February with my wife and kids I lugged my M8, ZM 35/2 Zeiss, ZM 50/2 Zeiss and 75/1.8 Voigtlander lenses along with an SF24D flash, 2 spare batteries, spare SDHC cards and an SC-17 cord. Everything was comfortable and swapping lenses was a breeze. Â When I swap a lens I remove the lens from the M8, tuck it (the camera) in with my arm lens mount first against my chest/belly, pull the new end out of the Shootsac, place the first end into the Shootsac, pull the M8 away from me and mount the new lens. Total time 10-20 seconds if I'm not in a hurry :-) Â Since the Shootsac is made of neoprene and stitched the way it is, it settles into the natural contour of your side and is very comfortable ad unobtrusive... Jeff G. Link to post Share on other sites More sharing options...
CalArts 99 Posted April 28, 2012 Share #10 Â Posted April 28, 2012 Back in the old days I used to glue two rear caps back to back. It made for quick lens changes (for speed not dust issues.) But in the end, I kind of think there's too much concern about dust and protecting the gear, etc., etc.. It's not fragile china. My own philosophy these days is 'just use it and don't worry.' Â (btw, looking at that shootsac video link.... what's a "wedding photojournalist?" That's a new one. ) Link to post Share on other sites More sharing options...
trond Posted April 28, 2012 Share #11  Posted April 28, 2012 I will be shooting a wedding in a couple of months, and plan to use my 50mm Summilux and 21mm Super Elmar. I will need to swap these lenses in and out frequently. I will be doing this swapping outside without the benefit of a sensor blower, but it shouldn't be wet or especially dusty. Assuming I do the swapping quickly, and point the lens opening of the camera downward during the process, do you think I'll need to be especially concerned about sensor dust? Thanks very much for your advice.  Dear jrovner,  It will help to keep the dust away if you turn off the camera before the lens change.  CCDs use high voltage for biasing, and these high voltages attract more dust than if the camera is switched off.  Best regards  Trond Link to post Share on other sites More sharing options...
Bill W Posted April 29, 2012 Share #12 Â Posted April 29, 2012 I don't necessarily have big hands but I have long fingers. I can hold a lens and twist off the rear cap in one hand and push the button and twist off the lens on my M with the other. I do a quick change and put the new lens on the M then attach the cap on the lens taken off. It leaves very little time when the camera is open to the elements. I have never dropped anything. Link to post Share on other sites More sharing options...
akiralx Posted April 29, 2012 Share #13 Â Posted April 29, 2012 As you should really be shooting wedding with two bodies in case your M9 fails, it might be best to rent another and have one lens on each. Link to post Share on other sites More sharing options...
jrovner Posted April 29, 2012 Author Share #14 Â Posted April 29, 2012 Thank you all for the speedy and very helpful advice. Jeff G: I've ordered a Shootsac, as it sounds ideal for my needs. And it will be a relief to shed my irrational fear of lens swapping. Link to post Share on other sites More sharing options...
elgenper Posted April 29, 2012 Share #15  Posted April 29, 2012 It will help to keep the dust away if you turn off the camera before the lens change.  CCDs use high voltage for biasing, and these high voltages attract more dust than if the camera is switched off.  A commonly heard advice, but hardly based on facts....  Presumably the shutter is closed while swapping the lens, and the shutter blades are metal. So, together with the camera body they form a Faraday´s cage around that sensor (we´re talking Leica M digitals here; some mirrorless cameras do have the sensor visible when removing the lens).  So, don´t add to your worries by trying to keep shutting the camera on and off on top of everything else! Take reasonable care with flying debris, otherwise just swap and be happy! Link to post Share on other sites More sharing options...
jaapv Posted April 29, 2012 Share #16 Â Posted April 29, 2012 Does a non-magnetic material like Titanium make an effective Faraday cage ? Somebody tell me.... Link to post Share on other sites More sharing options...
elgenper Posted April 29, 2012 Share #17  Posted April 29, 2012 Does a non-magnetic material like Titanium make an effective Faraday cage ? Somebody tell me....  It does. Magnetic properties don´t matter at all; what´s important is electrical conductivity. Remember, we´re talking about static (DC) charges here; shielding from RF fields, like cell phone towers &c is another thing entirely.  As an OT curiosity: the original Faraday´s Cage can still be seen at the Royal Institution in London, or at least it was there some 20 years ago, when I last visited. It has room enough for a full-grown man sitting on a chair, waiting for lightning to strike... Link to post Share on other sites More sharing options...
SJP Posted April 29, 2012 Share #18 Â Posted April 29, 2012 <snip> has room enough for a full-grown man sitting on a chair, waiting for lightning to strike... Â Long wait, but in essence what you say is correct. There is a corollary, the Franklin kite, one of the fastest ways to get yourself killed in a thunder storm. Still a useful experiment, and if you live to report your findings you become famous, justly so. Link to post Share on other sites More sharing options...
Jaybob Posted April 29, 2012 Share #19 Â Posted April 29, 2012 When it's time to change lenses, you just change them. Dust worry gets you nowhere. Â unless you're shooting a windy beach wedding... Â I use one of these but sadly they have been discontinued. Link to post Share on other sites More sharing options...
250swb Posted April 29, 2012 Share #20 Â Posted April 29, 2012 Yes just change lenses, but don't start out with dust on your sensor either. So do a wet clean beforehand and make sure it is spotless and then don't think about it. To speed up lens changes put a UV or protection filter on each lens and don't bother with a lens cap, only use the rear cap, it is quicker and there is less to fumble with. Â Steve Link to post Share on other sites More sharing options...
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