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08-31-2013, 06:39 PM   #16
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QuoteOriginally posted by crewl1 Quote
Only a slight bit on the FA 50, not at all on the 100.
On the 50 it becomes more like 1.7 and actually makes it seem sharper wide open like folks say the 1.7 is.
Thanks for your input. Sounds good. That thread is a great reference

QuoteOriginally posted by reeftool Quote
The circular hood from the DA 40 seems to do the job on a Takumar 55/1.8
Great job Richard. Really shows the improvement.

The question remains, why pentax didnīt use this kind of hood for DA70, when compactness a pillar in the limitedīs design philosophy? to ease the use of filters perhaps? DA15 and DA35 have slide out hoods. DA21 has internal filter thread and is easy to put on and remove.

I think I am going the 49-28 reducer way...
49mm to 28mm Step Down Filter Ring Adapter 49 28 | eBay

Now I need something like 27-18 for the DA40XS

08-31-2013, 07:39 PM   #17
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I think the real question is whether or not the circular design is as good as a petal type hood. Filter use isn't the issue. You still have to remove the hood to screw in a filter unless it is built in like the DA 15. I think using a CPL is easier with the circular hood than trying to stick my fat finger in the window Pentax builds into some hoods. Also consider that the majority of hoods from every manufacturer makes CPL use difficult. Thinking about it more, I think the circular hood is the easiest of all if you use a CPL. On a slide out hood, you have to push the hood back in to use a CPL and slide it back out when you have it positioned and take your shot.

I don't have too many other lenses to try it on. The sky opened up with a heavy downpour this evening a few minutes after I took those test shots. I had planned to take a couple of similar shots with the DA 40 also just to compare but not today. My F 35-70 is broken and all that works is the 70mm and the macro function. I have an M135/3.5 that is also 49mm and I could try it on that lens. It also has a sliding hood. I'm back to work tomorrow so it may be a couple of days before I can get time to take some shots and upload them. Still, I think the circular hood would be a good solution for anyone looking for a hood for older 50 and 55mm lenses with a 49mm filter thread.
08-31-2013, 07:54 PM   #18
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QuoteOriginally posted by JinDesu Quote
I actually really like the pull out hoods like the FA 31 more.
You must have a different version of the FA31. Mine has a fixed, low profile petal hood. The DA15, DA70 and FA77 have pull-out hoods.
09-01-2013, 12:38 AM   #19
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The DA35mm f/2.8 also has a pull out hood, I actually prefer the built in retractable hoods to the detachable ones. Many of my sigma lenses with their plastic lens hoods that after a while no longer fit properly due to years of professional abuse. But the fixed Hood of the FA31 can be really annoying when you use square filter systems. One of the first DA lenses I got was the DA16-45mm f/4 ED - not the greatest lens pentax ever made. But the hood was very well designed, and the polariser window was an excellent touch.

09-01-2013, 06:42 AM   #20
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QuoteOriginally posted by Sandy Hancock Quote
You must have a different version of the FA31. Mine has a fixed, low profile petal hood. The DA15, DA70 and FA77 have pull-out hoods.
No, I am mistaken - thinking it's a pullout. If it doesn't pull out, that's fine too. I like the look of it.
09-01-2013, 08:17 AM   #21
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QuoteOriginally posted by crewl1 Quote
Only a slight bit on the FA 50, not at all on the 100.
On the 50 it becomes more like 1.7 and actually makes it seem sharper wide open like folks say the 1.7 is.
There is thread somewhere that folks discussed this at length if you want to search for it.

Found a thread. I think user @soldbear was the inspiration. Looks also like on 50mm the effective aperture becomes 1.8.
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/197111-impromp...resistant.html
And this thread and another one running at about the same time.

Basically the effect is the same as stopping the M50 f1.4 down a touch. The reducers aren't really that effective as hoods unless you space them some distance from the front element surface, which is what the DA21 hood does.
09-01-2013, 04:39 PM   #22
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QuoteOriginally posted by kh1234567890 Quote
The reducers aren't really that effective as hoods unless you space them some distance from the front element surface, which is what the DA21 hood does.
I like to use hoods as protection for the front element as well since I don't like filters, and for this purpose reducers are perfect.
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