Has anyone noticed how finicky the mechanics of Sigma's rear lens caps are compared to Nikon's own? You've got to get them seated just right before they can be twisted and locked. They also seem to scrape against the electrical contacts sometimes. I wonder why Sigma ever used such an awkwardly-orchestrated design. I feel like I might lose a shot one day due to the clumsiness involved in putting them on when changing lenses. Is it just me, or do some others feel like replacing them with Nikon rear caps for the sake of practical use?
I think they buy them from Tamron. (Seriously.) The are identical, as near as I can tell. I don't think they scrape against the electrical contacts, or at least I've never noticed.
A while back I replaced them all (I have 5 Sigmas and Tamrons) with genuine Nikon rear caps for precisely these reasons.
Somehow some more of them snuck into the house, as I now have at least one and I think two of them rattling around in my bags. I think they came in on some of my used gear purchases. I'll have to go snuff 'em out again...
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!
>Somehow some more of them snuck into the house, as I now >have at least one and I think two of them rattling around in >my bags.
Yeah, they're like parasites...they multiply like wildfire.
Now what to do with them???
I think I have a solution. Let's do what they did on Star Trek:
Scotty: "I gave them a very good home, sir." Kirk: "WHERE?!?" Scotty: "I gave them to the Klingons, sir." Kirk: "You gave them to the Klingons?" Scotty: "Aye, sir. Before they went into warp, I beamed the whole kit and kaboodle into their engine room... where they'll be no Sigma rear cap at all."
I have just one Sigma, but i was thinking the other night what a pain it was to put on the rear cap, and my friend pointed out the nearly invisible black dot on the black cap that is supposed to line up with the red dot on the lens. AAUUGH!
"I am part of all that I have met." Tennyson
If you think education is expensive, try ignorance!
My first 2 lenses were sigmas, and came across the nightmarish caps. What I did was take my dremel, and drill a hole where the dot is, but not all the way through. I then put a drop of white out in it, and voila! I was able to see it at night.
I replace both front and rear caps with Nikon ones if possible. I used to have a Sigma 24-70 that had an 82mm filter thread for some reason. I had to use a Tamron front cap on it. I usually order a set of caps at the same time I order a lens.
You know, to fix the "only fits on one way" issue, all you have to do is take a pair of wire cutters/dremel to the vertical locking "ribs" inside the cap and remove them. That's what I did to mine for my 70-300. The only issue is that by doing it, the cap can rotate 360 degrees. However, it's not that bad because the bayonet locking part of the cap is actually tapered so that it tightens onto the mount as you turn, preventing over-spinning. (did anyone actually understand this? )