The Lee Tungsten Fluorescent (TFL) Polyester Filter Set with Gel Snap is a great choice for the architectural photographer or anyone shooting with mixed lighting and tungsten film. Lee makes kits specifically for shooting under fluorescent lighting: One for daylight film and one for tungsten film. This kit is for use with tungsten film and includes an FL3600-B, FL4300-B and FL5700-B.

Simply insert your 4 x 4" filter, snap it shut, and "snap" it on to any lens 82mm or smaller using the included "Elastomeric Tension Device", also known as an "E.T.D.", i.e, rubber band.

An FL-D filter is used when you wish to correct for the greenish tone that appears when shooting daylight film under general purpose fluorescent lighting. An FL-W filter is used to balance daylight film under warm white or white type fluorescent lamps. An FL-B filter is used to correct the color balance when shooting tungsten film under fluorescent lighting.

NOTE: The FL series of filters alone does not always guarantee 100% correct color balance when shooting under fluorescent lighting. They are general purpose filters intended for moderate correction and will not, by themselves, necessarily provide perfect color rendition.

Fluorescent lamps burn at many different temperatures and often require more demanding filtration for exact results. For specific filtration and professional use, it is strongly recommended that a color temperature meter be employed along with Color Correction filters (i.e.CC30M) when shooting under fluorescent lighting. This is the only proven way to achieve exact color correction.

no flash: (approx. exposure increase = 1-1/3 stop)

with flash: use Plus Green over flash (approx. exposure increase = 1-1/3 stops)

no flash: (approx. exposure increase = 1 stop)

with flash: use 1/4 CTO + Plus Green over flash (approx. exposure increase = 2/3 stop)

Related Questions and Answers

Q: 1. hi, would the kenko extension work with the NIkon D3100, I read on another post that they did not.... . does anybody know?

A: The Kenko Extension DG B&H # KEAETSND should work fine on the D3100 as long as you have a lens that will let enough light in for it to autofocus, if the lens hunts for focus just go to manual and focus that way. This is true on all cameras as per lenses. You may have little problems with zoom lenses, but with experience you will learn the how to adjust to any situation. I use them on a D7100 and love them.

Q: 2. is the kenko extension tube set compatible with Sony Mount A-99.... which is a DSLT camera.regards

A: Yes, the Kenko Auto Extension Tube Set is compatible with the Sony A99.

Q: 3. Does this set retain aperture control?

A: You should retain aperture and shutter control through the camera body.

Q: 4. Does this unit outputs Timecode so I can sync jam my camera? So I can us Tentacle as the master or main timecode generator.

A: Yes, the Tentacle Sync Sync E Mk2 Timecode Generator with Bluetooth is capable of acting as the master time-code generator.

Q: 5. Can I still auto focus with this unit?

A: Yes, it has full electronic communication but when shooting macro/close up, it is very difficult to achieve autofocus at such close range. It is much better to manually focus when shooting macro.

Q: 6. I returned one set of Vello tubes and am having pretty much the same problems with the 2nd set. With all 3 on a 200mm macro Nikon lens, I get FE for aperture. And there is vignetting with the tubes. Put on a 300mm 2.8 lens, it tries to focus but never locks. Does the Kenko set have the same reduced inner diameter that causes vignetting and are they likely to have the same problems?

A: The Kenko Auto Extension Tubes have a reduced inner diameter, however they will not cause vignette when being used.

Q: 7. will these work with Nikon 500mm f/5.6E PF ED VR Lens?

A: Yes.

Q: 8. I just purchased these and seen to be having an issue with the aperture rings not engaging far enough without shimming them 1/16 if stacked. I get the error EEf. Is there a way to adjust this or do I need to exchange them?

A: INSTALL A TUBE ON THE LENS FIRST. THEN INSTALL LENS AND TUBEASSEMBLY TO CAMERA. CHECK ALIGNMENT DOT ON ASSEMBLY WITHCAMERA BEFORE ROTATING AND LOCKING TO CAMERA.

Q: 9. What is the difference between the VI and VII Canon EF? And same question re the two Nikon F versions?

A: Vello Auto Extension Tube Set for Canon EF/EF-S Mounts and Lenses is 13, 21, and 31mm lengths. V2 is 12, 20, and 36mm lengths. The Nikon F V1 and V2 are the same just made at different factories.

Q: 10. I have a 100 mm macro lens and want to use these extension tubes with it. Is the seal between THE TUB AND THE LENS secure and tightly fitted? Another set I have is loose and I cannot use it for fear of lens falling off..This probably applies to other lens also and not just the 100 mm macro.. Thank you.

A: I'm using a set of Kenko Extension tubes with a 100mm 2,8L lens and its not loose at all.