Brightness issue with 360 panos?20674
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robinlucasphoto private msg quote post Address this user | |
| Hi my name is Robin and I recently got into google virtual tours using a Canon D IV a fisheye lens and manual rotator. When I went to a car shop to do my first tour, I had the settings set exactly where they wanted them. F8, iso 400, 3 brackets two stops apart. I started the panos and started to notice that 3 of the angles were fine. They were nice and bright but the 4th angle came out super dark. It was always the side facing the windows that came out extra dark. Need help. Any thoughts? | ||
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 WGAN FanClub Member Suisun City, California |
ScanYourSpace private msg quote post Address this user | |
Quote:Originally Posted by robinlucasphoto@robinlucasphoto I would recommend shooting iso 100. F8. 5 brackets with 2 ev so -4, -2, 0, +2, and +4 Any decent editor should be able to fix issues dealing with lighting of the brackets. Example. You’re shooting near a doorway or window where inside is on the darker side and outside is bright. |
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ron0987 private msg quote post Address this user | |
| @robinlucasphoto are you stitching your own panos? I use the same setting that @ScanYourSpace use and stitch them in PtGui Pro which combines and complete the pano and allows you some editing features. But in general they always turn out good with those settings. | ||
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 WGANStandard Member Los Angeles |
Home3D private msg quote post Address this user | |
| @robinlucasphoto - If your shots toward the window show the room as much darker, then your camera is NOT in the full MANUAL mode. Most SLRs have four primary settings. "M" is for fully manual, and this is what you ALWAYS need to use for panos. It's critical that all the images have the same exposure. The other three settings all will result in DIFFERENT exposures for each of the pano angles. "AUTO" is self-explanatory. The camera decides how to pick both the aperature and shutter speed. "A" is for Aperature, meaning that you choose the aperature (f-stop) you prefer, and the camera decides what shutter speed to use. "S" is for Shutter Speed and lets you set a shutter speed, so the camera decides what aperature (f-stop) to use. All three of these settings will result in your pano angle shots having inconsistent exposures. So remember, ALWAYS use only the "M" for Manual setting. No criticism intended, but it sounds like you're still learning to use this camera so let me provide some detail. (I was once a photography teacher so I can't help myself) And, I agree with - @ScanYourSpace - in recommending you use F8 as your aperture and capture 5 brackets with variation of F-stops, -4, -2, 0, +2, and +4. On my Sony full frame camera this is indicated by the menu choice of BRK 2.0EV-5 The BRK means the camera will automatically take several photos at different exposures - Bracketing The 2.0EV means the exposures will be 2 F-stops different from one another, so -4, -2, 0, +2, and +4 stops. "0" is the base exposure you start from. The "5" indicates the total number of exposures. Your camera may also offer 2.0EV-3 which would capture only three shots, -2, 0, and +2 F-stops. Also, if you want the best professional results, always capture your photos in "raw" format. I set my cameras to "JPG + RAW" which means I get a raw shot and a .jpg as backup just in case. RAW shots capture the full dynamic range of the camera's sensor. They will require that you process the raw shots through Lightroom or Photoshop's RAW process, but once you master this your results will be spectacularly superior to plain JPG photos. There are lots of tutorials on YouTube to get you going. I hope this is helpful. Good luck! Making HiRes panoramas is very satisfying. When you master it, you'll be hooked! Go to - SequoiaTour.com - and look at the HiRes panos in the Giant Forest part of the tour. I love this place so I brought my Nodal Ninja rig along on my last visit.  |
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WGAN Fan Club Member Suisun City, California |
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| @Home3D you don’t have to shoot panos in only M mode. My team and I shoot panos in Aperature priority and get fantastic results. | ||
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 WGAN FanClub Member Queensland, Australia |
Wingman private msg quote post Address this user | |
| +1 for Aperture priority mode as it is the one parameter that is very critical for depth of field. So I only set aperture to f8 or f11 and everything else will be on automatic. In fact the only automatic here will be exposure as even ISO can be set manually. Some times in a bright room I set initial step for bracketing to -1 or even -2 to account for too much light and set a step to +-2. You do not want to overexpose your photos and moving the step towards negativity helps to avoid it. I barely do 5 brackets as you get a much bigger set of photos for a single 360 when one shot needs 5 brackets for HDR merge. I use 3 and raw files with Sony a7riv and they are quite big in size to play with 5 brackets. |
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WGAN Standard Member Los Angeles |
Home3D private msg quote post Address this user | |
| @ScanYourSpace - If you're shooting panos outside or in a room like an art gallery where lighting is pretty uniform, you can lock an exposure and shoot your full set of angles with just one raw photo per angle. Same outside as well if the sun is pretty high in the sky and light is pretty uniform. However, the situation that - @robinlucasphoto - outlined was an interior shoot where s/he encountered a bright window in only one direction, which caused the camera to reduce the exposure so the interior walls of the room came out very dark, much darker than when the camera was aimed away from the window. In this situation, it's critical to completely lock the exposure, setting aperture, shutter speed and ISO to single values. Best procedure is to make your choices according to the setting, required depth of field, and then decide whether you need only single raw shots, BRK 3s or BRK 5s. @Wingman - I completely agree F8 or F11 is most critical. I also always use these, try to keep the ISO fairly low and let exposure time vary. I also use a Sony a7iv most of the time. Great camera. |
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WGAN Fan Club Member Suisun City, California |
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| @Home3D we only shoot raw for panos. 5 brackets. 6 shots around 1 up and 2 down. 45 bracketed images in total to make the one pano. We typically shoot about 20-40 panos a week for the hospitality industry and a few other use cases. No complaints. I recognize others may have different techniques but this is what works for us and our clients. |
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