Forum: Pentax Forums Giveaways
09-07-2016, 09:48 AM
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Forum: Pentax Forums Giveaways
12-14-2014, 12:28 AM
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All I want for christmas is you!
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Forum: Troubleshooting and Beginner Help
12-11-2014, 01:03 PM
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The lens has a 1B filter on it. Seemed to make it darker. The lens still look slightly yellow when looking through it at a white paper, even with filter off. I had tried taking photos with or without filter before. Probably just adjusted shutter speed slightly when pressing green button.
I witches from ABW to light bulb and all of a sudden the photos look white. Seems like the slight yellowing I think I see is very slight compared to what was going on with ABW.
I did another side by side with tamron and chi on f4.5, 50mm focal length 1/6 shutter speed and light bulb WB. Photos are now very similar. If I change the chinon to f1.7 and press green button I get 1/40 in same conditions! Again very similar pictures.
I tried the TAV mode which I just learned existed. Then ABW works fine, pressing lightly on the action-button does same thing as green button. Just choose aperture, hold lightly on the action-button and focus until the camera beeps, shoot! Even I can take decent pictures without fiddling now!
Thanks everyone! Now I am happy with the purchase and the lens!
Mike
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Forum: Troubleshooting and Beginner Help
12-11-2014, 01:01 AM
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Well, ok.
But if I set the camera to manual-mode and first use the tamron then the auto chinon is there any reason while with the same lighting in the room and the same focal length, f4.5 on both same shutter speed it would correct the white-balance differently?
It consistently gets more yellow with the auto-chinon.
I did some searching for auto chinon yellow and found this https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/207614-auto...yellowing.html
The lens is lying under LED-light now.
Should I use a specific type of LED-light or is anything good?
I understand it might go either quickly or slow depending on several things like power of the light etc.
But do all work, eventually?
Mike
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Forum: Troubleshooting and Beginner Help
12-10-2014, 01:21 AM
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Well you (crewl1) are probably right and when I got the lens I didn't fully realise the aperature manual thing, just the manual focus part of it.
However it still seems like an ok lens and I think it is manageable for her to shoot with. I got it for as little as 25 dollars including shipping to sweden.
This was just a spur of the moment kind of deal.
The real gift is a Tamron SP 90 mm Macro with auto-focus/aperture etc.
The Auto-chinon was just because I found it for cheap and her father had showed a Pentax 50 mm with f1.4 and she was amazed of the light through-put. Therefore the big issue with the Auto Chinon f1.7 seemingly a tad darker then the Tamron 18-250.
However. I followed your tip emalwick and took a foto with the tamron which apperently decided to go for f4.5 in the current light setting. I shot a photo of a picture on the wall. I then repeated with the Auto-chinon. Setting it to f4.5 and didn't press the green button. Therefore same shutter speed, same aperture and the same (at least very close) focus length.
Then it was obvious the Auto Chinon puts a yellow tint on the picture.
A google-seach later and I found a couple of threads discussing lenses getting yellow because of some radiation issue with old lenses.
This seems to be fixed by either direct sunlight or (more convenient in the northern latitude where I live and being winter) a LED light.
Thanks for leading me to this conclusion. From the other threads I gathered that the consensus was to leave it a week or so with direct light through the lens.
Except for some people thinking this was a feature of the lens and not a problem.
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Forum: Troubleshooting and Beginner Help
12-08-2014, 01:05 AM
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Ah, ok. So it doesn't show this number but still works as it should.
You have all really been great. Thanks for all the help!
Mike
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Forum: Troubleshooting and Beginner Help
12-08-2014, 12:32 AM
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Sorry for the late response. You have all been very helpful and I have finally found the time and oppurtunity (a time when the girlfriend isn't around) to test the lens again.
I first started off taking som pictures in USER mode with the tamron. It jumped back and forth between 800 and 1600 ISO in the lighting we hade indoors at that time.
I then attached the Auto Chinon and switched to M mode which was set at 100 ISO.
This could obviously make some difference.
I took a couple of pictures. Switched to the Tamron with manual on and took a few pictures of the same objects. Still think the tamron pictures are brighter but only slightly so.
Though the shutter speed is longer for the tamron so it might be the metering.
If I on the other hand set the auto chinon to f2.8 meter and then open it up to f1.7 and shoot som pictures it is really bright.
I found some video on youtube where someone used an old manual lens on a Pentax K5IIs. When he pressed the green button the display on the camera showed something like f2.8.
I can't get this to happen when using the auto chinon. It just keeps showing f--.
Is this normal?
Thanks,
Mike
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Forum: Troubleshooting and Beginner Help
12-04-2014, 09:40 AM
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The Tamron shot was taken in "user" mode set on the dial. Could def be ISO setting.
What do you mean with "metering" option?
Thanks for your input!
I'll check when I get a chance.
Mike
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Forum: Troubleshooting and Beginner Help
12-04-2014, 03:36 AM
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I can't say I noticed anything like the viewfinder being darker, I will check once I get a chance.
Could the ISO settings be different between "m" mode and "user" mode making one picture appear brighter on the LCD than the other simply because it was another ISO-setting?
As I said, I am a beginner. I know how to shoot pictures with the camera but my girlfriend makes all adjustments.
Just want to make sure the lens works as it should before we end up getting to christmas and discover the lens is something wrong with.
I am not sure the picture is too dark, it is just darker then a picture taken with the tamron lens.
Picture 1: Auto chinon, Manual Focus, Manual Mode, f1.7 aperture ring setting, "green button", shoot.
Picture 2: Tamron, Auto Focus, User Mode, about the same focal length/zoom, shoot.
Both pictures are of the same object. The Auto Chinon one turned out darker.
Could this be because of the "User" mode settings.
Should I try both lenses in "manual" mode using the green button, or isn't that possible with the tamron?
Thank you,
Mike
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Forum: Troubleshooting and Beginner Help
12-04-2014, 01:34 AM
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Hi,
I or rather my girlfriend has a Pentax K5IIs. I bought her a new lens which I am planning on giving her this christmas and was just going to try it out so that it works alright before I gave it to her.
So I tried this lense once I got it yesterday and I couldn't really figure out the correct way of using it.
The lens is a Auto Chinon 50 mm f1.7 manual focus / manual aperture lens.
I switched the camera to Manual Focus and Manual Mode and tried to shoot some pictures.
First, of course, I had the error "F--" on the display. Some quick googling I found that I needed to permit aperture ring in the menu.
Then I could finally at least get the camera to operate. Though the pictures were very close to black.
I then figured out the "green button" to get the camera to set shutter-time (or something).
This got me to a point where I can take pictures with the camera. Though they are still dark.
If I set the lens to f1.7 on the aperture ring it is still considerably darker then her "standard" lens a Tamron 18-250 f3.5-6.3 lens.
This doesn't really seem right. I bought the lens after her father had displayed his Pentax 50 mm f.14 lens (though with auto-aperture) which gave fantastic bright pictures.
When you turn the camera on with this Auto Chinon lens attached and in manual mode the first thing it says is that I should select aperture setting.
I then get a range of values to choose from. Lowest being 8 and highest somewhere around 300. Can't figure out what this setting does.
Any help would be greatly appreciated.
Oh, and i don't know anything about the ISO-setting or any other settings that might be going on in the camera and screwing things up so I there is anything that I should check as far as those are concerned please let me know.
Thanks,
Mike
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