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Type: Posts; User: Quebec Golf

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  1. Replies
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    The raw converter I use has a generic vignetting...

    The raw converter I use has a generic vignetting removing tool, I imagine other software does as well. It's pretty straightforward to use for removing actual vignetting (circular pattern about the...
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    GIMP is free and has Clone and Heal tools as well...

    GIMP is free and has Clone and Heal tools as well as an equalizer function that is very very close to what is used on JP.

    Alex
  3. How did you bring the contrast up? Was it with...

    How did you bring the contrast up? Was it with Curves or some sort of automated tool?

    Alex
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    My experience with a 70-300 (on 1.6x crop frame)...

    My experience with a 70-300 (on 1.6x crop frame) indicates that Rwy 23 morning arrivals is the only spot where 70mm is truly not wide enough. You need at least 250m between you and the subject to...
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    Good evening, I picked up a couple rejections...

    Good evening,

    I picked up a couple rejections lately, both for Colour.

    https://www.jetphotos.com/viewqueued_b.php?id=7402978
    https://www.jetphotos.com/viewqueued_b.php?id=7433131

    Come to...
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    I opened in RawTherapee and scrolled around the...

    I opened in RawTherapee and scrolled around the midtones of the fuselage (the greyish areas), the G and B channels were showing consistently higher than R. I did the picking point WB on a spot in the...
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    Is the issue still present even after doing that?

    Is the issue still present even after doing that?
  8. Replies
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    Does your editing software just let you set WB by...

    Does your editing software just let you set WB by selecting a white/grey area of the image?

    Alex
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    Just wanted to say thanks to the screener who...

    Just wanted to say thanks to the screener who fixed the night shot category on my shot earlier today instead of rejecting (https://www.jetphotos.com/photo/9371007). I appreciate it!

    Alex
  10. Replies
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    No need to feel foolish, it is not a popular...

    No need to feel foolish, it is not a popular subject. MFA is micro focus adjustment. It's the ability to compensate for a tendency to back or front focus for a given body-lens combination. As it...
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    The 77D is indeed appealing. Even the buffer size...

    The 77D is indeed appealing. Even the buffer size is essentially identical to the 80D. Comparing the two I would pay attention to the following on the 77D:

    1. inability to perform MFA in-camera...
  12. It's both. Lift and thrust both suffer. 1....

    It's both. Lift and thrust both suffer.

    1. Lower air density (not oxygen) means a higher speed is required to achieve the same lift. This higher speed requires a longer time spent accelerating,...
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    Nah, it's only about a 0.1% gradient. I would...

    Nah, it's only about a 0.1% gradient. I would have been happy to take the runway as level, but then the fence post would look tilted and I suspect I'd be asking for rejection advice all the same. ;)...
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    Hello, the following photo was recently...

    Hello,

    the following photo was recently rejected for Horizon Unlevel: https://www.jetphotos.com/viewqueued_b.php?id=7369432

    When submitting I added a note explaining that I chose to use the...
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    I'm sure the crew will let you know the official...

    I'm sure the crew will let you know the official position but I did want to mention that I have uploaded both of those with Special Livery selected without any issues.

    Regards,

    Alex
  16. I don't know much about PS anymore, but reading...

    I don't know much about PS anymore, but reading the following https://helpx.adobe.com/ca/photoshop/using/resizing-image.html makes it sound like bi-linear is probably not the best method to use....
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    The following was rejected for Categories Wrong...

    The following was rejected for Categories Wrong or Missing. No comments were provided and the system does not allow me to check what categories were selected. Can someone from the crew advise:

    -...
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    Sure sounds like Flickr is your culprit there....

    Sure sounds like Flickr is your culprit there. Saving at quality 12 in PS wouldn't have resulted in a 65kb file. That's probably Flickr processing to save space, I've seen other sites doing the same....
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    A 3-digit can be a great money saver but I would...

    A 3-digit can be a great money saver but I would watch out for, among other things, a) reduced buffer size (if shooting RAW) b) resale value (especially the intentionally poor external finish...
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    In my experience this is exactly the type of...

    In my experience this is exactly the type of light that makes the JP histogram go haywire. I.e. the type of picture where my photo editors would show the histogram touching the right hand corner but...
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    I use the 80D and love it. Don't know if it's a...

    I use the 80D and love it. Don't know if it's a huge upgrade over the 60D but having more resolution definitely gives more leeway in capturing and processing. I too could not justify giving up the...
  22. My reply was in response to: My point is...

    My reply was in response to:



    My point is that for typical combinations of distance-to-subject and focal-lengths, an aperture setting of f/8 will provide enough DoF to cover the subject. In...
  23. I've done the math before and f/8 really does...

    I've done the math before and f/8 really does have you covered for DoF for most aviation photography situations.
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    Kevin, it looks like you already have all the...

    Kevin, it looks like you already have all the important stuff (lighting/contrast, sharpness etc) figured out! To my eye that's perfect sharpness in those photos, not too little, not too much. Hope...
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    Very true. Also, it's not just that jpeg is...

    Very true.

    Also, it's not just that jpeg is lossy by definition that will cause you to see jpeg artefacts, it's also the fact it's 8 bit colour. Think of a picture that is 800 pixels tall that has...
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    Thanks for looking Dana. As far as the magenta...

    Thanks for looking Dana.

    As far as the magenta blocks in the equalized image go, I've been looking for a while and eventually found the culprit last night. It was the automatic CA correction in...
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    I appreciate your reply and need more...

    I appreciate your reply and need more clarification: What kind of digital manipulation could the magenta blocks (in the equalized image) be indicative of? I.e. is the thinking of the crew that I...
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    Rejection question

    Greetings,

    the following photo was rejected for Digital Manipulation, no further details were provided in the rejection email.

    ...

    What is the reason for the rejection?


    Regards,
  29. Thread: Histograms

    by Quebec Golf
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    I can't help you but I can add that the JP.net...

    I can't help you but I can add that the JP.net histograms also look different than the ones in GIMP and RawTherapee. I'm referring to luminosity histograms across all three.

    Alex
  30. Replies
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    Sticky: This system only goes back so far, uploads from...

    This system only goes back so far, uploads from the early years of the site do not appear to be counted.
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    Hot photo question (737 MAX)

    Hello all,

    I have a question for the crew: are photos of 737 MAX aircraft stored (or being ferried to) in unusual locations during the grounding considered hot?

    Relevant part of upload...
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    Sticky: Message the photographer to let him know to...

    Message the photographer to let him know to change the date/time setting in his camera! (Check out the EXIF)
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    Things to focus on: 1. Blurriness - from my...

    Things to focus on:

    1. Blurriness
    - from my own experience I know that developing a good panning technique is worth more than all the L lenses in the world. This will take time and practice....
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    Also, can you tell us a little about the camera...

    Also, can you tell us a little about the camera settings you are using? I see from the EXIF of the Westjet that it was shot at 135mm and 1/400 shutter speed, which should give reasonable odds of...
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    I always take the opportunity to plug my trusty...

    I always take the opportunity to plug my trusty Canon 55-250mm IS STM. It is excellent and surprisingly cheap. To give you an idea for zoom capability: on a crop frame body (like your 800D) it will...
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    Low light shooting, less noise, wide angle of...

    Low light shooting, less noise, wide angle of view at a given lens focal length and probably other things I haven't thought about. I'm sure someone who uses a full frame can fill us in. A major...
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    One thought I have is that when erasing through...

    One thought I have is that when erasing through to another layer with different tones you will create a visible edge. I.e. your sky will be a different shade of blue and will show the edges of where...
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    The Canon nomenclature is different. EF-S lenses...

    The Canon nomenclature is different. EF-S lenses are for cropped sensor bodies and don't fit full frame cameras. It is not an indicator of lens quality or value. The Canon DSLRs you listed are all...
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    1/250 isn't slow enough to limit burst speed, it...

    1/250 isn't slow enough to limit burst speed, it would take a shutter speed closer to 1/8. FPS is a mechanical thing with the shutter and mirror, the camera should be able to sustain it indefinitely,...
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    It's internal camera memory. It's where pictures...

    It's internal camera memory. It's where pictures go after you've captured them but before they have been written to the memory card. Buffer size is important because if you are shooting at a high...
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