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About Gareth

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    Norfolk, UK


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  • Joined Alamy
    18 Jun 2018

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  1. The Photographer's Ephemeris is a good site to help plan your astro shoots. It's a paid app for android and ios, but the desktop version is free. It's ideal for predicting the sunsets/moonsets etc. https://photoephemeris.com You could also have a look at photopills, another paid app which allows you to visualise your scenes on location, in real time with augmented reality. https://www.photopills.com I'm a novice astrophotogtapher myself, and have found that planning the shoots ahead of time is well worth it, though as Rico said we've missed the optimum time for the Milky Way this year in the northern hemisphere, but those clear, crisp autumn/winter nights are still worth photographing. Good luck. Gareth.
  2. Not sure how helpful this might be to you, but I too have been having fringing issues - not using the same gear as you, but fringing is fringing! And when the CA correction fails to work sufficiently, this method works well. Anyway, it's an old Photoshop trick so I've learned, and it works well for me....I don't use Lightroom, so again not sure how useful it is to your workflow. 1 duplicate layer 2 apply Gaussian blur at 15 pixels to copied layer 3 set layer mode to 'colour' 4 apply layer mask to bring back colour detail where needed from layer below I'm sure there are quicker ways, but this method saved me where all else failed, though as spacecadet says, if it's too bad, it's probably not worth saving!
  3. Thanks again, yes I intend to take it to Wex (and Fixation) tomorrow for a clean. Just watched a YouTube video of someone replacing the shutter assembly themselves!....not for the faint hearted, but I won't be doing anything quite so reckless! I'll be taking it slow....and cheap! Gareth.
  4. @M.Chapman Thanks, I appreciate your input, it's both reassuring and worrying! It makes sense....only happens for me when it's been hot and the camera has been in direct sunlight for a little while. I wonder if it would make any difference if I 'loosened' it up prior to taking a shot by giving it a quick 10fps burst? I think I know the answer to that though....I'm grasping at straws! So it looks like I'll be shooting in cooler temperatures from now on - just googled cost for replacement shutter assembly....sobering! Gareth.
  5. Just popped back to the location in the image (only a 10 min drive from where I live) to recreate the conditions, took a spare card also. Couldn't replicate the heat on that particular day, but took some shots, same settings/composition etc, and nothing - no line, just a nice, clear blue sky....and that ruddy church....sick of it now actually! lol Tried it with the old card onto which I shot the original, same deal, nice and clear! I've updated to the latest DNG converter also just in case, but I don't think it was the problem since it's in the RAW file, before it gets anywhere near any processing. The only thing I can think of now is that it was some sort of freak atmospheric condition, or maybe the heat....I just don't get it! It's such a neat line right across the top third....if it's an intermittent glitch, I may have to just live with it and attempt to plan around it when (if?) there's anymore sunny, clear days this year. Oh well, I think I've managed to satisfy myself that while it's annoying, it hasn't wrecked any other images so far, but I'll be taking it in for a sensor clean tomorrow anyway. Many thanks to everyone for your kind advice. Gareth
  6. Yes, but I didn't apply one....honest! I have to agree....now I'm really worried! What's infuriating though, is that I can't seem to replicate it today. All the sky or plain background shots I've taken today show nothing! (Except that blimming dust/oil spot!) Anyway, it's just gone through QC, so I suppose my 'fix' was decent enough - not sure I'll put it on sale though. Gareth.
  7. @spacecadet Just checked again, and it is indeed dead straight and quite sharp....maybe a pixel or two....not looking good....I'm worried now! Annoyingly I can't really compare it to the horizon since I must have levelled it quite well....they're both parallel! Missed Wex today, they shut at 5pm....I'll take it in tomorrow for an assessment and/or clean - not brave enough to do it myself! @Martin P Wilson I found the original RAW file - it was still on my memory card....for once I'm thankful for being lazy!! However, it's still there in the RAW....doesn't show up clearly until I do some tweaks though. I don't think it's a software issue unfortunately, I'm up to date, or at least compatible with my Camera Raw and Photoshop versions (ACR 6.7, PS CS5) I'll change out my memory card for another too, maybe eliminate that as an issue. Haven't had any success replicating the problem today though....I'll keep trying. By the way, is there a trusted way for me to upload a RAW file anywhere, for anyone who wants to take a gander? Gareth
  8. Thanks to everyone for all the advice. I've been trying to replicate the phenomenon today, with no success - cloudy skies here today. Tried to shoot a plain surface with flat light....no line but the 'dust/oil' spot shows clearly. I've checked some earlier images from when I first noticed it, but I can't seem to find any problems with them now! Am I going mad?! Feels like it!! I don't have any of the original RAWs either....I convert to DNG as soon as I get them out of camera (I'm using older software which doesn't recognise the 7dmk2s CR2 files) The image I posted above seems to be the only (worst by far) image I have, so maybe it's a strange, haze effect when shooting directly away from strong sun into a clear blue sky. @Colblimp I haven't done that, (sorry Wim, nerves got the better of me!!) @Inchiquin & @BobD Yes, I see where you're going. @Sprocket I was shocked when I did that.... Probably not worth trying to salvage this image....but it does illustrate the problem....hmm....is there any way to pull this from QC before it's evaluated? As for a sticky shutter blade....could heat affect the shutter action? On the few occasions I've noticed it, it has been very hot....at least 25°C, and in direct sun it felt a lot hotter - the camera felt pretty warm too. @AndrewP Thanks, I tried this, and was not able to see any issue....which is somewhat comforting. @wiskerke I did that also, no line I'm relieved to say. @MDM I agree, in fact I think I'm on my way now, I'm not far from Norwich, and indeed Wex is where I buy most of my gear, so I know them pretty well. I hope it is just a simple clean that is necessary, and not something more serious. Fingers crossed! Thanks again everyone that took time out to respond with advice. Gareth.
  9. Ha ha! I really hope you're right Wim! I haven't yet dared submit one without being 'fixed' first - wouldn't want a failure due to 'banding' and I'm not sure Alamy would believe me! Good idea, thanks - looks like tomorrow (or rather later today) will be a testing day for me. I'll try the breathing trick too - if I can keep my nerves in check!....at least I'll be able to see if my sensor needs professionally cleaning. Thanks for your help and advice Wim. Gareth
  10. Forgive my ignorance, but wouldn't breathing on the sensor possibly leave moisture on it? Or is that the point? Would this 'mist' it up in order to highlight a smear? I must admit, I've always been (perhaps over-) careful about exposing the sensor, never even looked closely at it for fear of getting it dusty! I have only recently begun to shoot landscapes - and it's only been during this recent hot weather that I've been able to shoot clear skies - it doesn't show on cloudy skies....I suppose I should at least be thankful for the changeable weather here in the UK lol, should be back to clouds and rain anytime now! I first noticed it a few weeks ago, but buried my head in the sand like an idiot! But yes, I will go back through my files, there must be at least one with a clear sky....the weather can't have been that bad! Oh, and it's horizontal. Thanks Wim. Gareth
  11. I've never had it professionally cleaned, I just use a puffer gently for dust spots - maybe I should get it properly done. 16 bit Yes - can even be seen on the back of the camera. Seems pretty straight. It is a tonal change though - seems to abruptly change from the darker tone above to the lighter tone below, over maybe a 10 pixel range when zoomed right in. Sorry about the blotchyness - no other processing/NR done! I never thought of this - definitely worth a look. Thanks Wim.
  12. I wonder if there's anyone who can shed any light on an issue I'm having with clear, blue skies? There appears to be a fairly straight, single line running horizontally at about the upper third, across my images of cloudless blue skies. I don't think it's banding, since it's evident straight out of the camera as an unprocessed RAW. And isn't banding a processing artifact? I really hope it's not a defect on my cameras sensor - it's a Canon 7d mk2 - I've tried to find out if it's a particular problem with this camera, but the evidence is inconclusive. I've managed to blend an overlay in photoshop to mask it on some images (feels like cheating!), but this is proving to be an awful lot of work when it interferes with buildings etc. Short of avoiding shooting anything with clear skies (I don't want to do this), I don't really know what to do. Here is a recent image - just basic JPEG processing from the original RAW. (I know about the dust spot on the right before anyone says!) Any help would be gratefully received, thanks. Gareth
  13. Sometimes even wider....the Zeiss Super Q-Gigantar 40mm for example, which has a staggering f0.33 aperture - though only if your first name is 'King of' or 'Queen of'! [**edit**] OK, not a great example - seems this lens was just a publicity stunt, but the Meyer-Optik-Görlitz 50mm f/0.95 prime is real enough.
  14. 13 tries today! I have to admit I lost my patience and began clicking randomly out of sheer frustration....must have got lucky! Those Captcha folks sure do love that grain filter!
  15. I've made a couple of mini soft boxes and diffusers using bits of leftover cardboard, some tin foil and an old bedsheet as a diffuser material - thankfully I found one with only a few stains!!....eww!....did I just type that out loud? I meant to say I found an unused one!....Phew! I think I got away with that! Anyway, they work well enough and cost me nothing. Your pics look pretty good, perhaps a tiny bit on the cool side - a quick WB tweak in LR should fix that, although it could be my monitor! Agreed, wholeheartedly!
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