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12-20-2009, 09:46 AM   #1
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mysterious black band

Hi, wondering if anyone can tell me what this might be as I have never seen it before. k200d with kit lens with lens hood. Along the right side of the picture there is a weird non-uniform black band. Camera was held in portrait mode so it's on the bottom of the sensor. It showed up once in a landscape shot but I only took two landscape style shots. Showed up on all vertical shots except for one. Did a hundred or so shots after this in a different setting and didn't show back up. I couldn't see the band when chimping so it was upsetting when I got home and noticed it. I shot RAW +jpeg and it showed up on both. Think it may have to do something with the lights and lens hood but it doesn't make sense when it showed up on the landscape image also at the bottom. Thanks


12-20-2009, 10:01 AM   #2
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Could this be shutter not open fully when the flash went off?
12-20-2009, 10:20 AM   #3
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It is definitely a sync speed issue with your flash. Are you shooting with a flash and not using P-TTL? If so, it appears that the flash or trigger can't handle the 1/180s sync speed. I've experienced this problem with those cheap ebay wireless triggers. Try slowing the shutter speed down a notch and see if that resolves the sync.

- Jason
12-20-2009, 11:11 AM   #4
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It does look like a flash sync problem but your EXIF data tells me your shutter is set to 0.0063 s (1/160), this shouldn't be a problem unless you've got rear curtain sync on or as inferno10 said your using wireless triggers.

12-20-2009, 11:25 AM   #5
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It appears to be a shadow. I have had this happen with the kit lens using the pop-up flash with the lens hood on and shooting at the wider end. My kit lens has a petal type hood and will appear as a rounded shadow in the center of the frame on the bottom. Being even across the bottom would suggest a flash issue but since it turned up in an outdoor landscape shot, maybe not. Did you use the flash for the outdoor shot?
12-20-2009, 06:04 PM   #6
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QuoteQuote:
Think it may have to do something with the lights and lens hood but it doesn't make sense when it showed up on the landscape image also at the bottom. Thanks
Try replacing the batteries in your flash triggers. This is a very common symptom when the batteries get low in wireless triggers.
12-20-2009, 10:10 PM   #7
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I do use the cheap ebay triggers and I have use them on my Nikon d40 and shoot up to 1/500 and never had a problem. I usually use my d40 for portrait/fashion stuff but used my k200d as I needed a bigger image size for these pics. The curtain thing makes sense. Off camera (trigger) the highest speed is 1/160 not 1/180. There were three flashes used in this pic, all off-camera no popup, so the shadowing is not it. I needed the fastest shutter speed to black out what was behind the glass as much as possible. I'll do some more tests using 1/160 and slower to see if it shows up again but I feel the curtain is the answer. Thanks guys and have a wonderful holiday.
12-21-2009, 12:26 AM   #8
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yep, shutter prob with the ebay triggers. took 15 shots both at 1/160 and 1/125. black banding on some of the 1/160, none on the 1/125. because I have my histogram show up on display, the black banding wasn't evident when I was shooting as the histogram covers it. plus did 15 shots using pc cord at 1/160, no banding. ebay triggers (pt-04) is the prob. My d40 has an electronic shutter so it has never shown up. Need to switch to pocket wizards but I can't swing 4 units atm. It's good to know your equipment's limitations.

12-21-2009, 08:27 AM   #9
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ditto what alohadave said. Switch battery on the TX. That's the symptom that shows up so you know it has to be replaced...
12-21-2009, 09:50 AM   #10
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That may help, but regardless of what I do, the best shutter speed I get out of my ebay triggers is 1/125 as well.
12-21-2009, 03:21 PM   #11
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QuoteOriginally posted by pfcapture Quote
yep, shutter prob with the ebay triggers. took 15 shots both at 1/160 and 1/125. black banding on some of the 1/160, none on the 1/125. because I have my histogram show up on display, the black banding wasn't evident when I was shooting as the histogram covers it. plus did 15 shots using pc cord at 1/160, no banding. ebay triggers (pt-04) is the prob. My d40 has an electronic shutter so it has never shown up. Need to switch to pocket wizards but I can't swing 4 units atm. It's good to know your equipment's limitations.
I started off with those PT04 triggers, and promptly resold them. I've had better luck with the Yongnuo triggers, though my Pentax AF-360 FGZ still has a sync issue at 1/180. Since then, I've upgraded to FlashWaves, since I too can't afford PocketWizards. With the Flashwaves, all my flashes work just fine up to the 1/180 sync speed. I recommend giving those a look; they're costlier than the Cactus and Yongnuo triggers, but they're cheaper than PocketWizards and are much more reliable.

- Jason
12-21-2009, 04:27 PM   #12
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If you are using RF-602 then it would only sync at around 1/125.
It has already been discussed here on the forums before.
I was about to get one but refrained after I learned about this not being 100% compatible ONLY to Pentax system!

Here's the link: https://www.pentaxforums.com/forums/camera-studio-accessories/69648-rf-602-wi...-triggers.html
12-21-2009, 08:49 PM   #13
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where does one find these flashwaves to buy?
12-21-2009, 10:18 PM   #14
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You used to be able to purchase them directly from g9chon.com. Now, you can purchase them on Amazon (A223 Photo is who I purchased from. I think they are g9chon): Amazon.com: FlashWave2 Wireless Radio Slave (Remote Wireless Flash Trigger System) - Transmitter and Receiver Set: Camera & Photo

The Yongnuo triggers I used before were the CTR-301. Looks like they've since been replaced by the CTR-301P. Again, this trigger worked fine at 1/180, with the exception of my Pentax AF-360.

- Jason
12-22-2009, 09:59 AM   #15
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QuoteOriginally posted by inferno10 Quote
You used to be able to purchase them directly from g9chon.com. Now, you can purchase them on Amazon (A223 Photo is who I purchased from. I think they are g9chon): Amazon.com: FlashWave2 Wireless Radio Slave (Remote Wireless Flash Trigger System) - Transmitter and Receiver Set: Camera & Photo

The Yongnuo triggers I used before were the CTR-301. Looks like they've since been replaced by the CTR-301P. Again, this trigger worked fine at 1/180, with the exception of my Pentax AF-360.

- Jason
Says "currently not available".
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