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11-14-2019, 05:44 PM   #16
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QuoteOriginally posted by ramseybuckeye Quote
I have had the 20-40 for just a short time and my cap stays on. I imagine when it starts to slide off I will probably apply a thin layer of rubber cement inside the lip of the cap, but that would probably no last too long. After reading this thread I tried a couple of ideas. A 62mm pinch cap fits on the hood, but can be pulled off rather easily. I put a 49mm cap inside the hood, but it was too hard to remove. without removing the hood.
Get something like this on ebay
https://i.ebayimg.com/images/g/wwYAAOSwrZBcQcz5/s-l300.jpg

I have many ebay cap like above and all of them are very firm and work better than Pentext latest generation plastic cap. Get exactly the same look as seen on the image, became most other design doesn't grip on the hood that well. Or even better, use the Pentax FA plastic cap version. It is thinner and firmer.

11-14-2019, 06:19 PM   #17
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I also tried a couple different 62mm caps but it's worse than the original due to the smooth hood.
I'm leaning towards buying a set of step up rings to use instead of the hood. They're cheap enough.

Note to Ricoh/Pentax - How about threads on the insides of the DA20-40 hood?

QuoteOriginally posted by ramseybuckeye Quote
I have had the 20-40 for just a short time and my cap stays on. I imagine when it starts to slide off I will probably apply a thin layer of rubber cement inside the lip of the cap, but that would probably no last too long. After reading this thread I tried a couple of ideas. A 62mm pinch cap fits on the hood, but can be pulled off rather easily. I put a 49mm cap inside the hood, but it was too hard to remove. without removing the hood.
11-14-2019, 06:30 PM   #18
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QuoteOriginally posted by kcjonez Quote
I also tried a couple different 62mm caps but it's worse than the original due to the smooth hood.
I'm leaning towards buying a set of step up rings to use instead of the hood. They're cheap enough.

Note to Ricoh/Pentax - How about threads on the insides of the DA20-40 hood?
Now I see why! Sorry I was not realized the inner part of the hood is smooth. Then it doesnít matter how firm grip the cap is. Yes, youíre right. they should have made threads on the hood.
On 10-17, it has threads on the inner part of the hood, thatís why a cap can firmly grip on it and we can use a circular filter on it as well (I guess filter is not useful for a fisheye lens like that).
11-14-2019, 06:34 PM - 1 Like   #19
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QuoteOriginally posted by ramseybuckeye Quote
I have had the 20-40 for just a short time and my cap stays on. I imagine when it starts to slide off I will probably apply a thin layer of rubber cement inside the lip of the cap, but that would probably no last too long. After reading this thread I tried a couple of ideas. A 62mm pinch cap fits on the hood, but can be pulled off rather easily. I put a 49mm cap inside the hood, but it was too hard to remove. without removing the hood.
I bought my 20-40 in May 2014. I replaced the hood with a 55-58 & 58-62 step up ring with generic centre pinch 62 mm cap.
Never had any issues.
The main reason for this was already having 62mm filters.

11-14-2019, 06:51 PM   #20
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QuoteOriginally posted by kcjonez Quote
I also tried a couple different 62mm caps but it's worse than the original due to the smooth hood.
I'm leaning towards buying a set of step up rings to use instead of the hood. They're cheap enough.

Note to Ricoh/Pentax - How about threads on the insides of the DA20-40 hood?
Hmm, I don't have the tools, and it may not be feasible, but maybe tap threads into the hood.
11-14-2019, 10:15 PM - 2 Likes   #21
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I have stored away the original lens hood and cap. I use a Neewer 55mm reversible lens hood and cap instead. Works well. Unfortunately, I'm not sure they are still available - couldn't find one on a quick search.
11-14-2019, 11:07 PM   #22
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QuoteOriginally posted by tokyoscape Quote
Now I see why! Sorry I was not realized the inner part of the hood is smooth. Then it doesnít matter how firm grip the cap is. Yes, youíre right. they should have made threads on the hood.
That's what I was explaining (badly apparently) in post 5.
11-15-2019, 01:51 AM - 1 Like   #23
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I bought my 20-40 in March 2015, and the flocked ring hasnít really changed much. The cap wonít fall off by itself but can be pulled off by brushing against something accidentally - itís got a couple of small dings where itís hit the ground like this.

I bought a rubber screw-in hood and matching pinch cap when I got the lens, but I prefer the aesthetic look of the original small hood, so I still use the original cap. I wonít be selling the lens, so the ongoing condition of the cap is irrelevant for me, really.

11-15-2019, 02:42 AM   #24
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QuoteOriginally posted by kcjonez Quote
When I got my DA20-40 a couple years back, I noticed the lens cap could be knocked off if it brushed up against something. Over time it has loosened to the point where it simply falls off when i am walking. I have lost count of the times I have retraced my steps to find it, yesterday being the most recent. It is a friction fit flocked cap and I assume the flocking has become compressed or lost over the years.
I don't have this lens, but I do have the DA 70 Limited and DA 10-17, which have the same style cap. I've never had an issue with either.
11-15-2019, 04:20 AM   #25
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The DA 10-17 cap is a lot deeper, and mine actually takes a bit of a tug to get it off!
11-15-2019, 05:05 AM   #26
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I haven't used a rubber hood in many decades. Undoubtedly still have a few in the bottom of some junk box :-)

My cap also has a few dings from biting the dust, and I will also never sell my 20-40 most likely.


QuoteOriginally posted by microlight Quote
I bought my 20-40 in March 2015, and the flocked ring hasnít really changed much. The cap wonít fall off by itself but can be pulled off by brushing against something accidentally - itís got a couple of small dings where itís hit the ground like this.

I bought a rubber screw-in hood and matching pinch cap when I got the lens, but I prefer the aesthetic look of the original small hood, so I still use the original cap. I wonít be selling the lens, so the ongoing condition of the cap is irrelevant for me, really.
11-15-2019, 08:33 AM - 1 Like   #27
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if you buy generic black lens caps:

11-15-2019, 03:50 PM   #28
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QuoteOriginally posted by pepperberry farm Quote
if you buy generic black lens caps:

Customise Your Lens Caps | The Film Look - YouTube
Right. To circumvent the problem of removal without having to remove the hood, simply obtain a conventional cap having a central pinch-removal facility.

I've had my 20-40mm LTD since 2016 and I am fortunate- the cap is still fine, still snug under normal conditions and use. But, since I nearly always carry my camera with lens in a shoulder/belt holster-type case, and since I typically have items in the case's front accessory pocket- even including a DA 15mm LTD lens, an internal bulge is created by these items. This creates a pinch effect just above the bottom of the case. When pulling out my camera, this pinch effect will very often remove the lens cap. I take this from a positive viewpoint- I have an automatic cap-removal system when I reach for the camera to shoot! I just give a quick glance to see if the cap is off, and if so proceed in shooting! Pretty handy, actually.
11-15-2019, 03:58 PM   #29
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That's a pretty neat way to customize lens caps.
11-15-2019, 04:12 PM   #30
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QuoteOriginally posted by stevebrot Quote
I don't take my friction-fit caps into the field. Pinch caps are cheap and generally stay on, problem solved.


Steve
^^^ +1 ^^^ I believe it is a 55mm filter size, so a 55mm clip-on cap (not quite common, but not hard either).
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