Tag Archives: file

What is Wrong with My Phone’s Longest Lens?

The quality of modern phone cameras is really impressive.  I will often have the main camera with a longer lens and use the phone for the wider shots.  Other times, it will be the only camera I have.  Quite often I will shoot multiple images with the longest of the three lenses and then stitch them together when I get home.  This can be quite effective.  However, in playing with some images recently, I was getting very odd results from the shots.  I shoot RAW on the phone, but I understand it isn’t a true RAW file but one that Apple’s software pre-processes to some extent.  This seems to be resulting in some strange image qualities.

The shots will have the resolution that they are supposed to, and the file size is certainly large enough to suggest that is what is happening.  However, the shots look ridiculously smudgy.  Here are a couple of examples that show the problem.  The Allegiant jet I shot at Mesa Gateway is a particularly bad example.  It isn’t even the one shot. All three of them are rough.  I have had some shots with really great quality from this lens on the phone so I have no idea why this should be bad.  The odd thing is that, if I look into the file properties and compare with other shots with this lens, it shows a different focal length.  If anyone has any experience or background on this, please let me know.

Adobe Fixed the Time Zone Issue for Video

In this previous post, I noted that there was a problem with the way in which Lightroom identified the time of video files.  I was having to manually adjust the capture time after importing them.  When I contacted Adobe, they said it was a problem with Canon and vice versa.  Not helpful.  However, I notice that, with a recent update (I won’t say upgrade because some aspects of it seem to have really screwed up Lightroom performance), the video files now come in with the correct time associated.  I only found this out because I was about to adjust them when I realized they were already correct.  One little annoyance has now gone away.  Hurrah!

High ISO Raw File Size

On my previous camera bodies I had occasionally shot at very high ISO settings as a result of the lack of light.  I had not paid a huge amount of attention to any secondary effects of doing so.  My current cameras had a work out in some very low light when I decided to test them in some rather unfriendly conditions.  When I was at home, I was running some disc backups and I found I could not get the normal number of files onto a single disc.  A quick bit of investigation and I could see why.  The high ISO shots had a significant increase in file size.  As I understand it, RAW files, while containing all of the data from the sensor, do have an amount of compression applied.  I imagine that the noise inherent in high ISO shots means that the compression is less effective as there is so much variation across pixels.  As an example, a shot at ISO 320 will average at about 22Mb.  The shots at ISO 51,200 are coming in at over 30Mb.  At ISO 204,000, the files can hit 40Mb. That is quite an increase!  Something to keep in mind when planning to shoot in very low light conditions.