RX-1 owners: Is your aperture circular??

Started Dec 11, 2012 | Discussions
maxuci Contributing Member • Posts: 737
RX-1 owners: Is your aperture circular??

Someone else started another thread about this, but it was mis-tilted.  The aperture in my RX-1 is not round throughout its range (worst in the middle of hte range range around f/2.8-f/10).  Several other commentors said they saw the same thing in their RX-1s (the same specific blades of the aperture sticking).

If you have an RX-1 can you please look at your aperture blades and report whether yours is prefectly circular or looks like mine?  I am trying to decide if I want to return the camera for a new one or if they all have this problem...

Simply just put the cam in A mode and look down the lens while adjusting aperture. Or, shoot an out of focus point source of light at various apertures and inpsect the photos (works best shooting a distant light source while manually focusing the camera to the minimum focus distance).

Thanks!

teseg
teseg Senior Member • Posts: 2,210
Re: RX-1 owners: Is your aperture circular??

Mine looked almost exactly like yours... So with the camera on I spun the aperture ring between 2 and 22 around 20-30 times and it is starting to look much more round, not that it was catastrophic to begin with.

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DaleNorth Forum Member • Posts: 55
Re: RX-1 owners: Is your aperture circular??
1

Mine is about the same as yours. I don't see it being an issue, though.

lenshoarder Contributing Member • Posts: 609
Re: RX-1 owners: Is your aperture circular??

I don't have a RX1, but I've been aperature obsessed after getting a Sony 16mm lens with a off center aperature for my NEX.  I have a RX100 and just last night I was admiring the aperature.  For only being 7 blades, it's a thing of beauty.  It's so circular.  I'm impressed.

There will obviously be some variance in manufacturing.  I don't think what you have will have an effect on IQ.  Although for $3,000 I'd expect better.

packlite
packlite Regular Member • Posts: 114
Re: RX-1 owners: Is your aperture circular??

I've been thinking about ordering an RX-1 and this concern about the non-circular aperture blades bothers me a bit. I awoke this morning to find Amazon had (has) the RX-1 in stock so I went ahead and ordered with one day shipping for $3.99 (easily returned if need be).

However, I am still concerned about the a-blade issue. I went thru the somewhat painful experience of being an early adopter of the X100 with its sticky aperture blade issue so you can understand my concern.

What I would like to know is if this non-circular a-blade rendition on the RX-1 is normal or not. So far, everyone who has chimed in on this question has said their blades look like this. So far, no one has indicated that their blades are "near perfect circular" as stated in the Sony features brochure.

So which way is it ?

Does anyone have an RX-1 with nearly perfect circular aperture blades as illustrated in the photo at this top of this thread ?

thanks,

Charles

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packlite
packlite Regular Member • Posts: 114
Re: Here's what the Aperture Blades Should look like ??

Okay, here's a writeup on the almost circular RX-1 aperture and shows a photo of, perhaps, what it SHOULD look like

http://sonyalphanex.blogspot.com/2012/10/sony-dsc-rx1-specs-revised-and-misc-info.html

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zerozeronine Contributing Member • Posts: 595
Mine too...

Mine looks exactly like that.

I returned it, got another, and even that one looks exactly the same. It's the same aperture blade, sticking out the same amount.

The manufacturing is very precise, seeing how exactly the problem is replicated. Is not everyone seeing this problem???

I'm now debating what to do, as I have less reason to believe that exchanging this would help. Now the question is whether I return this for good or live with it (which is possible).

Kaz

oorwullie Junior Member • Posts: 34
Re: Mine too...

teseg said, "Mine looked almost exactly like yours... So with the camera on I spun the aperture ring between 2 and 22 around 20-30 times and it is starting to look much more round, not that it was catastrophic to begin with."

So is it possible that over time, with use, the blades will eventually sort themselves out to form a proper circle?

emailnotebox Junior Member • Posts: 33
Mine looks exactly like yours

Are there anyone with perfectly circular aperture blade?

It seems alike everyone is having the same issue.

This is my first leaf shutter lensed camera. While the outcome of the images doesn't bother me, I wonder if anyone with other leaf shutter lens models ever found that the aperture blade is not perfectly circular.

-- hide signature --

Steve

bufo New Member • Posts: 15
Re: Mine looks exactly like yours

Mine is also uneven.

OP maxuci Contributing Member • Posts: 737
Re: Mine too...

zerozeronine wrote:

Mine looks exactly like that.

I returned it, got another, and even that one looks exactly the same. It's the same aperture blade, sticking out the same amount.

The manufacturing is very precise, seeing how exactly the problem is replicated. Is not everyone seeing this problem???

I'm now debating what to do, as I have less reason to believe that exchanging this would help. Now the question is whether I return this for good or live with it (which is possible).

Kaz

I returned mine and should have the replacement next week; I will post an update for that camera.  I'm just worried it's going to have the same problem plus some other issue like dust on the sensor lol

Mark Rinella Regular Member • Posts: 207
Mine are about the same.

Definitely not perfectly circular.

Richard Spangler Contributing Member • Posts: 915
Re: RX-1 owners: Is your aperture circular??

The tighter I quinch the more my hole the less round  I usually shoot from about f2 to f 5.6.  should I be worried if my hole is not circular past that?

Richard Spangler Contributing Member • Posts: 915
Re: RX-1 owners: Is your aperture circular??

Sorry for the sarcastic comment but in all seriousness the aperture is perfectly round on my RX1 up until about F8/11 then it looks like the rest of the examples on here. Im really not going to worry about it.

chiumeister Contributing Member • Posts: 615
Re: RX-1 owners: Is your aperture circular??

same situation on mine.  perfect until f8.

in my case, i am sending it back as my sensor has a couple of oil spots.

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teseg
teseg Senior Member • Posts: 2,210
Re: RX-1 owners: Is your aperture circular??

chiumeister wrote:

same situation on mine. perfect until f8.

in my case, i am sending it back as my sensor has a couple of oil spots.

Chiumeister... Any chance you quickly moved your aperture ring back and forth quickly multiple times? I'm trying to assess whether such action may cause those spots.

I know I did and soon after found my spots (the first time I checked for spots) so wonder whether there is any relation as such action causes many bits in the lens to flail around (but I doubt it)?

On Monday Laredo received my camera, on Wednesday (yesterday) I received my confirming email they received it. But now I wait. Certainly I will not have my camera for Christmas but am now hoping for New Year as I will be leaving for downtown Chicago on the 30th and would love to have the camera with me.

Still I debate would it have been better to get an exchange from the vendor? It would have cost return shipping money and then I would have no gaurantees with the replacement quality so think I did the right thing, if all is fixed properly (and I get it back next week).

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Sean_Jayhawk
Sean_Jayhawk Veteran Member • Posts: 7,439
Re: RX-1 owners: Is your aperture circular??

teseg wrote:

On Monday Laredo received my camera, on Wednesday (yesterday) I received my confirming email they received it. But now I wait. Certainly I will not have my camera for Christmas but am now hoping for New Year as I will be leaving for downtown Chicago on the 30th and would love to have the camera with me.

We'll be in downtown Chicago for X-Mas (probably walking around downtown on the 24th). A little better timing and we could have had a Michigander's RX1 photowalk in Chicago.

Mine are good only from f/2 - a tick above f/5.6. At f/5.6, I can see the circle disappear and not come back until f/22. I don't often shoot past f/8, but f/5.6 and f/8 are both affected. Hmmm.

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teseg
teseg Senior Member • Posts: 2,210
Re: RX-1 owners: Is your aperture circular??

Wouldn't the primary impact of slightly out-of-round aperture blades be the shape of bokeh balls? In which case ideally the large apertures are round. Any other potential visual impacts? I can't imagine by f5.6 and above there is any chance of noticing the impact of slightly out of round aperture blades.

In summary, I would love for someone to show me an example with an RX1 where the slightly-off circle aperature negatively impacted the resulting picture... Because really, this should be the concern.

Sensor spots, color-cast, decentered lenses, these are real issues that can be clearly identified in a resulting image... I'm not so sure I've seen an example from the RX1 where the aperture circle has impacted IQ, but would be very interested in seeing if it does exist.

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Sean_Jayhawk
Sean_Jayhawk Veteran Member • Posts: 7,439
Re: RX-1 owners: Is your aperture circular??

teseg wrote:

Sensor spots, color-cast, off centered lenses, these are real issues that can be clearly identified in a resulting image... I'm not so sure I've seen an example from the RX1 where the aperture circle has impacted IQ, but would be very interested in seeing if it does exist.

On macro-like shots, I can generate the bokeh balls even at f/5.6. I'll try taking a photo here in a bit with the room darker and the x-mas tree lights on in the background.

I have noticed an effect that I see often in the bokeh balls that I don't think is supposed to happen. I even saw it on the very first shot I took:

Notice the swirly lines in the bokeh ball just the right of the snowman? I see those lines in bokeh balls often. Here is a less pronounced version in the day time:

Don't Worry

I keep meaning to see if this is happening on other RX1s in the photos on Flickr.

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teseg
teseg Senior Member • Posts: 2,210
Re: RX-1 owners: Is your aperture circular??

I, too, have seen bokeh ball swirls in pictures others have posted in Flickr with this camera. Not sure it can be attributed to the aperture circle though. Not sure what causes that.

sean lancaster wrote:

teseg wrote:

Sensor spots, color-cast, off centered lenses, these are real issues that can be clearly identified in a resulting image... I'm not so sure I've seen an example from the RX1 where the aperture circle has impacted IQ, but would be very interested in seeing if it does exist.

On macro-like shots, I can generate the bokeh balls even at f/5.6. I'll try taking a photo here in a bit with the room darker and the x-mas tree lights on in the background.

I have noticed an effect that I see often in the bokeh balls that I don't think is supposed to happen. I even saw it on the very first shot I took:

Notice the swirly lines in the bokeh ball just the right of the snowman? I see those lines in bokeh balls often. Here is a less pronounced version in the day time:

Don't Worry

I keep meaning to see if this is happening on other RX1s in the photos on Flickr.

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