JessM Loc: Port

1xMetal Adapter Ring 67/72/77/82/86mm For Cokin Z Pro Hitech Filter Holder Kit

This set of adapter rings is offered on eBay at less than 9 USD, but the seller can't say if the rings will fit (thread match, etc) for our new Tamron 180mm macro lens. All we need is a 72mm adapter ring for the Viltrox JY67ON ring flash which mounts on the adapter ring via a clamping system. A 72 mm adapter was not supplied with the flash. We'd be grateful for any advice... 73... ~jessM
PS: I've never used the the Cokin Filter Holder, so I have no understanding of how it "fits" a camera. In any case, this question relates to the rings, not the holder.

jeweler53

I don't believe that adapter will do what you need. It appears that the maximum ring size supplied with the flash is 67mm. You will need a "step down ring" to go from the 72 mm on your lens to the ring supplied with the flash. This should work: Neewer 11pcs Step-down Adapter Ring Set 26 30 37 43 52 55 58 62 67 72 77 82mm. Keep in mind that since the size of the opening on the ring flash is smaller than the front of the lens, some vignetting may occur.

JessM Loc: Port

Thanks, Jeweler53! Yes, 67mm was the largest in the box. I suppose I could buy a 72mm (lens size) and then have a machinist cut that down to the OD of the 67 mm, but that'd be like killing ants with dynamite, I suppose. I'll go for the Neewer set. I'm grateful for you advice.... ~jessM

newtoyou Loc: Eastport

These are handy,but be aware, plastic, or at lease mine are.

JessM Loc: Port

Thanks! I've ordered the down-sizing rings instead. They might even be handy for my 67 mm polarizer as well.

Nikonian72 Loc: Chico CA

One great advantage of your 180-mm macro lens is the exceptional working distance (lens front element to subject) at closest focus, which renders true 1:1 macro-photography.
WD for your lens is about 11-inches. That is excellent room for other methods of diffusion illumination. Ring-strobes are historically under-powered, and illumination falls-of dramatically with distance to subject.
Starting at page 4, take a look through this thread to see several different methods of diffuse illumination for field macro-photography: https://www.uglyhedgehog.com/t-32754-4.html

JessM Loc: Port

Nickonian72, I'm already indebted to you for the set-up you showed a while back. I'm using it now, with a Micro-Nikkor 105 mm and 2 speedlights: a Lumopro LP 180 with a Fotodiox 6x9" diffuser and a Viltrox JY67ON ringflash. The LP-180 is slaved to the ringflash, btw. The Lumopro/diox extends over the end of the lens to eliminate its shadow. Usually, both flashes are set to 1/128 pwr and the shutter to 1/250 sec. This arrangement helps to reduce motion blur. As you point out the light is pretty weak. Yet, within only a few inches from the lens, it seems to do some good. Of course, the working distance is pretty small, and moving in this close does scare off some bugs. Hence, the employment of the Tamron 180mm lens. I'm going to pursue using the same set-up as with the Micro-Nikkor 105, just to learn a few things, but I'm already preparing to try one or more of the ideas presented in the URL you've cited. Muchas gracias!!