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DrJohn

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  1. Like
    DrJohn reacted to Donald Mackie in What is Your Favorite Lens for Astrophotography?   
    A follow up just because
     I purchased both the Tamron and the Sigma with the intent to test both side by side, then returning the loser. In the end however it just wasn’t that easy. Two outstanding lenses.  Outstanding. There is no loser. I’m not, by nature, a pixel peeper except when I’m testing stuff for purchase and I did some here but more just looking at photos in Lightroom with little or no adjustments. Kinda of just how the photos felt (if that makes sense)
     
    I’ve never been too terribly concerned with weight (within reason) but I must admit the Tamron’s feather weight was more enticing than I would have thought. Especially having both out and about in the field for a real world comparative test. It’s just a treat to have that good of a lens that really feels like it’s not even on the camera. Without diving too deep into peeping, if I had to review my results comparing the two lenses between 17-24 (focal points both cameras share) I’d say the only difference I noticed was of a color profile. Despite The conclusions of a couple of comparative reviews on YouTube in which the results were, the Sigma was warmer, I disagree. I love the look of the Tamron.
    The Tamron focused a touch quicker but the differences were so small as to simply not be an issue. I’m an occasional “Manual focus” guy so the Tamron lost points there against ease of a MF/AF button on the Sigma.
    The Tamron scores big, big points (at least for me) for its filter threading capabilities. It lets me use my existing filters and also affords me tons of expansion filter choices. That and it’s such a light, small lens the difference between a screw on filter on a light lens against a heavier lens with an even bulkier filter kit is pretty considerable.
    In the end however (at least for me) it really only comes down to focal length. Both lenses IQ are simply amazing. Amazing. The difference however between 14mm and 17mm for my style of photography was just too much to ignore. It’s kinda massive.
    If you don’t need 14mm the Tamron wins and considering the price vs IQ,  pretty handily. If you need that IQ quality down to 14mm the Sigma is equally as stunning but at a much higher cost of entry and a more difficult filter scheme.
    I bought the Sigma.
  2. Like
    DrJohn reacted to Donald Mackie in What is Your Favorite Lens for Astrophotography?   
    I can testify from experience (albeit not for Astro) the Sigma 14-24 f/2.8 is truly a remarkable lens. You will absolutely not be disappointed!
  3. Like
    DrJohn reacted to Tim Driman in Bird In Flight -- share your BIF photos here!!!   
    Lilac-breasted Roller skims the freshly burnt patch in search for a freshly roasted insect :-)

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  4. Like
    DrJohn reacted to Dondeando in Bird In Flight -- share your BIF photos here!!!   
    Booted Racket-tail

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    DrJohn reacted to Iansky in Bird In Flight -- share your BIF photos here!!!   
    A recent shot taken at a local nature reserve with the A9 + 100-400mm
     

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  6. Like
    DrJohn reacted to larrywongphotography.com in Bird In Flight -- share your BIF photos here!!!   
    Sony A9 with Canon 400mm F4 DO II and Metabones V adapter. (www.larrywongphotography.com)

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  7. Like
    DrJohn reacted to Ziggy in Bird In Flight -- share your BIF photos here!!!   
    Nice work.
    A bit underexposed?
  8. Like
    DrJohn reacted to Ziggy in Bird In Flight -- share your BIF photos here!!!   
    Pacific Black ducks enliven a cold dull morning.  Australia.  A9 & FE 200-600mm

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  9. Like
    DrJohn reacted to Alejandro Espeche in Bird In Flight -- share your BIF photos here!!!   
    Buteogallus meridionalis
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    Sony A7R3 + Sony FE 100-400
     
  10. Like
    DrJohn reacted to Dondeando in Dinia mena   
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  11. Like
    DrJohn reacted to wildlightphoto in Arizona bird life   
    Common birds of Cochise County Arizona
     

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    Hello guest! Please register or sign in to view the hidden content.  
    all photos: a7rIII, FE 100-400 GM
  12. Like
    DrJohn reacted to LiveShots in Air Show - Colorado   
    Sony a9, 70-200 f2.8 + 1.4TC
    More at LiveShots
     

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  13. Like
    DrJohn reacted to Terry He in Enchanted Rock State park Starry sky and sunset glow together   
    Sony ILCE-7M3 ƒ/2.8  20s 1635GM 16mm ISO3200
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  14. Like
    DrJohn got a reaction from Thad E Ginathom in They like me and come to me   
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  15. Like
    DrJohn reacted to Iansky in 85mm f1.8 first portrait images - loving it.   
    I have recently purchased the Sony 85mm f1.8 to use on my A7iii for portrait work and had the opportunity to try it out yesterday when we were in Bath celebrating my wife's 65th birthday.
    It was an overcast day but we found a suitable area and I used some fill flash to lifet her from the back ground.
    The eye focus is amazing and never missed a beat locking on very quickly.
    This is one of the images
     

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  16. Like
    DrJohn reacted to Glosgas in Sony 200-600 mm with 1.4x or 100-400 mm with 2x   
    Here's a picture I tool some time ago of the moon with my FE 100-400mm.  It was hand held; 400mm ISO 1,000 1/2,000 f/5.6.
    I want to get the 2x converter for both Astronomy and Wildlife; we're off to Namibia next year and I was intending to use the 100-400mm in conjunction with the 2x converter.
     

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  17. Like
    DrJohn reacted to SAF Admin in Sony A7R IV launched   
    Sony has launched today the Sony A7R IV!
    Sony A7R IV at a glance
    61 MP Sensor 26 MP in APS-C mode 15 EV dynamic range 10 fps serial shooting w/ full C-AF 68 images buffer 5 axis IBIS 567 phase AF points realtime Eye AF photo / video – and for animals realtime tracking 5.8 MP OLED EVF 4K Video w/ S-Log 2/3 Dual SD-Slot (UHS-II compatible)   Sony A7R IV Product Images
  18. Like
    DrJohn got a reaction from Hummingbird in An interesting photo or a bad photo? Lotus pond   
    Interesting...
    John
     
  19. Like
    DrJohn reacted to Iansky in The Flying Scotsman   
    We had the refurbished "Flying Scotsman" steam train through our county today and I took my Father-in-law who is 89yrs old to see it, he has only ever seen it in a museum not live on the railway.
    We were lucky as it remained dry even if a little dull after days of continuous rain.
    A fantastic sight and a real please to be able to grab some photos of it under steam!
     

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  20. Like
    DrJohn reacted to scrane in Loving the 24-105   
    Sharp and versatile. On my last trip overseas I only brought the 24-105 without regrets.

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  21. Like
    DrJohn reacted to mack100 in Great Tit (Parus Major)   
    Hello guest! Please register or sign in to view the hidden content. A7Riii 100-400GM@400mm F5.6 1/500th ISO1600
  22. Like
    DrJohn got a reaction from LiveShots in Swan at 400 mm   
    This was taken with a Sony A7RIII and Sigma 100-400 mm at 400 mm. The Swan was approximately 50 feet away? It was shot at f/8, 1/250th second, ISO 200. No post processing. File was reduced in size for the internet.
    John

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  23. Like
    DrJohn got a reaction from Thad E Ginathom in Swan at 400 mm   
    This was taken with a Sony A7RIII and Sigma 100-400 mm at 400 mm. The Swan was approximately 50 feet away? It was shot at f/8, 1/250th second, ISO 200. No post processing. File was reduced in size for the internet.
    John

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  24. Like
    DrJohn reacted to Glosgas in Sunspots AR2740 & AR2740   
    Here's a picture I tool this afternoon of Sunspots AR2740 & AR2740 using my Sony ILCE-7RM2 and FE 100-400 f/4.5-f/5.6 GM OSS.
    The lens was zoomed to 400mm and the camera setting 1/2000s at f/8.
    I use a Thousand Oaks solar filter to cut down the brightness of the sun.

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  25. Like
    DrJohn reacted to Dondeando in Rainbow Hopper   
    Sony a6000 w/Batis 85 1.8
     

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