atanabe Posted March 25, 2007 Share #1 Posted March 25, 2007 Advertisement (gone after registration) All, I have finally been able to purchase an IR-UV Cut filter and by gosh it does work! My tungsten lit shots now have the correct color and blacks (synthetic fabrics) are once again, black. I have read about mounting the UV-IR cut filter on a Voightlander 15 with silicone adhesive in another thread. I thought that this was too permanent of a fix so I thought about using O-Rings to facilitate a tight fit between the filter thread and inner surface of the built in lens hood. My fix provides a tight fit for the filter while still allowing the removal of the filter at a future time. Items needed: B+W UV-IR Cut filter 39mm x 0.5 part number 1014112 1-5/16" I.D. (1-7/16 O.D.) x 1/16" wall O-Ring Voightlander 15mm f4.5 lens First, clean the lens surface and blow all dust from both filter surface and lens. The O-Ring is a little smaller than the actual filter threads, but will expand to the right size when this is complete. Place the filter on a flat surface, thread side up. Place the O-Ring on the one edge of the threads. Holding this with your forefinger to keep it from slipping, gently expand the O-Ring over the rest of the threads. The fit is tight, the O-Ring is about 3/16" smaller than the filter thread (1-1/2"). Make sure that the O-Ring is evenly distributed on the threads by gently rubing the circumference of the O-Ring. The next step is to mount the filter onto the lens, remember to clean the lens before this step!. Blow off any dust on the filter and lens surface. Place the lens on a flat surface, with the rear lens cap on. The filter glass should at no time be touched with your fingers or any tools! As evenly as possible, press on the mounting ring starting at the top and bottom of the scalloped lens hood. Do not press one side in at a time, that would result in an uneven, non parallel journey. Be patient, it is tight, when you come to the side portions of the lens hood you may need to push the bulging O-Ring a little to continue (finger nail work well). The last part of the process is to get past the cutout of the hood which will also have a little bulge from the O-Ring, push this in while applying pressure to the filter ring. I found it helpful to use a micro-fiber cleaning cloth over the filter to prevent me from leaving my finger prints on the filter glass. You will not be able to completely hide the O-Ring, as the threads of the filter are higher than the scalloped edges of the lens. To remove the filter, place a finger nail at between the O-Ring and the filter thread, pry outward and the filter should free itself. The filter is pretty tight in there and while I have not tested this under combat conditions, the filer should stay in place fairly well. Regards, Al Link to post Share on other sites More sharing options...
Advertisement Posted March 25, 2007 Posted March 25, 2007 Hi atanabe, Take a look here UV-IR Cut filter on CV 15. I'm sure you'll find what you were looking for!
hdrmd Posted March 25, 2007 Share #2 Posted March 25, 2007 This sounds like a great idea. I have been using very small folded paper shims at 3 and 9 o'clock, but this sounds much better. Thanks. DR Link to post Share on other sites More sharing options...
grober Posted March 25, 2007 Share #3 Posted March 25, 2007 Al, What is your lens cap solution now with the filter "permanently" in place? (39mm screw-in cap?) Thanks! -g Link to post Share on other sites More sharing options...
sisoje Posted March 25, 2007 Share #4 Posted March 25, 2007 How about some demo. images of the process it self? Sorry, I am kind of more visual than verbal and English us my second language:D Link to post Share on other sites More sharing options...
atanabe Posted March 26, 2007 Author Share #5 Posted March 26, 2007 Al, What is your lens cap solution now with the filter "permanently" in place? (39mm screw-in cap?) Thanks! -g The filter still sits wihin the confines of the lens hood. The original metal cap is still used. Link to post Share on other sites More sharing options...
roubaix Posted March 26, 2007 Share #6 Posted March 26, 2007 I got my CV15 this week and would love to see some pictures of the above technique. Thanks, Peter Link to post Share on other sites More sharing options...
atanabe Posted March 26, 2007 Author Share #7 Posted March 26, 2007 Advertisement (gone after registration) Okay, here are the pictures. The first one shows the O-Ring and filter, second a cross section of the filter with O-Ring on, third the filter at the first stage of insertion. Note at this point, the filter is on parallel to the lens, once the filter has been inserted the filter will be below the level of the lens hood. The O-Ring package. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/19777-uv-ir-cut-filter-on-cv-15/?do=findComment&comment=212213'>More sharing options...
sean_reid Posted March 26, 2007 Share #8 Posted March 26, 2007 Al, That's a nice simple solution. Thanks for the details and photos. Cheers, Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 26, 2007 Share #9 Posted March 26, 2007 Great idea. How about the 12mm CV have not seen any shots of the lens itself and maybe a solution for that Link to post Share on other sites More sharing options...
sean_reid Posted March 26, 2007 Share #10 Posted March 26, 2007 Great idea. How about the 12mm CV have not seen any shots of the lens itself and maybe a solution for that Hi Guy, With the 12, you might want to use the CV filter holder. Cheers, Sean Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 26, 2007 Share #11 Posted March 26, 2007 Yea 72mm , It would feel like shooting a DSLR lens. Looks like you may fit a filter in like the 15mm but i would bet it would vignett since this lens is so wide Link to post Share on other sites More sharing options...
atanabe Posted March 26, 2007 Author Share #12 Posted March 26, 2007 Yea 72mm , It would feel like shooting a DSLR lens. Looks like you may fit a filter in like the 15mm but i would bet it would vignett since this lens is so wide Guy, With the 1.33 crop factor the vignette may not be a factor. I just took a look at the photos on Camera Quest's site and if the edge of the filter rim is below the lower sides of the hood you should be good. But without seeing the actual lens it would be hard to determine the true cutoff points. I have had the CV 15 for six years now and have a lot of pictures of my index finger and know where the field of view is for this lens . Al Link to post Share on other sites More sharing options...
cbretteville Posted March 26, 2007 Share #13 Posted March 26, 2007 Al, thanks for sharing this. Excellent idea. Link to post Share on other sites More sharing options...
sisoje Posted March 26, 2007 Share #14 Posted March 26, 2007 Okay, here are the pictures. ... The O-Ring package. Can you give us a direction on where to get this kind of ring? Hardware store? Link to post Share on other sites More sharing options...
sean_reid Posted March 26, 2007 Share #15 Posted March 26, 2007 Yea 72mm , It would feel like shooting a DSLR lens. Looks like you may fit a filter in like the 15mm but i would bet it would vignett since this lens is so wide I think it would vignette but I haven't tried it. It's a large filter but what the heck...you're going to be on a tripod for interiors work anyway so if its a little more bulky...so be it -- so long as it gets the job done. I've used the 12 in rooms where the 15 wasn't wide enough. Cheers, Sean Link to post Share on other sites More sharing options...
atanabe Posted March 26, 2007 Author Share #16 Posted March 26, 2007 Can you give us a direction on where to get this kind of ring? Hardware store? Most hardware stores should have this in stock. You can also try a plumbing supply store. Cost for two O-Rings weere $0.65 US. Link to post Share on other sites More sharing options...
robsteve Posted March 26, 2007 Share #17 Posted March 26, 2007 Most hardware stores should have this in stock. You can also try a plumbing supply store. Cost for two O-Rings weere $0.65 US. Does the filter hit the front element of the lens? On my 15mm, if I put a filter on this way, it will hit the front element of the lens. Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 26, 2007 Share #18 Posted March 26, 2007 This is the one shot I have seen on it. Hard to tell Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/19777-uv-ir-cut-filter-on-cv-15/?do=findComment&comment=212598'>More sharing options...
ck1 Posted March 26, 2007 Share #19 Posted March 26, 2007 As suggested previously here I used a 39mm filter with silicone glue around the metal rim of the filter (steady hand !) and then carefully placed the filter onto the plastic surrounding the front glass element of the CV 15mm The filter fits perfectly inside the hood, is rock solid and the 1mm or so of glue allows the filter to just clear the front glass element. A semi-permenant solution but the IR cut filter needs to live on the lens.... Link to post Share on other sites More sharing options...
atanabe Posted March 27, 2007 Author Share #20 Posted March 27, 2007 Does the filter hit the front element of the lens? On my 15mm, if I put a filter on this way, it will hit the front element of the lens. My filter does not touch the surface. This copy is six years old now, production specs may have changed. Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.