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Jadom 
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Joined: 01 September 2014 Country: United States Location: Poland, USA Status: Offline Posts: 2615 |
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 Topic: Mirror lenses (2)Posted: 03 July 2025 at 20:39 |
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Jack.SigmaDP1x,DP2M,SonyA7M2,Min: MC35F2.8, AF50F1.7, 70-210F, SL16-35F4, KironKine 80-200F4Macro, Promaster MC28F2.8, Rokinon 85f1.4, Samyang 14F2.8, Tamron: SP AF 28-75F2.8XR Di LD, 70-300 F4-5.6Di
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pegelli
Admin Group 
Dyxum Administrator Joined: 02 June 2007 Country: Belgium Location: Schilde Status: Offline Posts: 39065 |
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Posted: 22 May 2025 at 19:03 |
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The sensor read-out speed of the A7Rv electronic shutter is 1/15th of a second. So considerably longer than the 1/500th of a second shutter time. Since it takes 1/15th of a second to read from the first to the last lines of the sensor a slight swaying of the camera results in this "swinging" building, which is obviously enhanced by the long focal length.
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You can see the April Foolishness 2023 exhibition here Another great show of the talent we have on Dyxum
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Hezu
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Joined: 13 October 2007 Country: Finland Location: HKI/KSNK Status: Offline Posts: 4926 |
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Posted: 22 May 2025 at 17:15 |
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woodrim
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Joined: 19 October 2009 Country: United States Location: Charleston, SC Status: Offline Posts: 1979 |
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Posted: 22 May 2025 at 12:44 |
That's what I was thinking, but don't really know how the e-shutter works. If it scans from top to bottom, that might explain it. 1/500th second may sound fast, but with a 500mm mirror lens and handheld, it is easy to create motion blur. |
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Regards,
woodrim |
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jkp1
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Joined: 25 November 2005 Location: Denmark Status: Offline Posts: 2303 |
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Posted: 22 May 2025 at 08:12 |
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No...it can only happen due to movement
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MichelvA
Alpha Eyes group 
Knowledge Base Contributor Joined: 26 April 2008 Country: Netherlands Status: Offline Posts: 21069 |
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Posted: 22 May 2025 at 07:24 |
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Is it usual that the electronic shutter brings more perspective distortion?
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Respect Observe Capture Enjoy
Color management |
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mariuszlo
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Joined: 17 December 2007 Country: United States Location: Jersey City Status: Offline Posts: 4107 |
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Posted: 21 May 2025 at 22:19 |
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Such an observation
Minolta AF 500mm Reflex, LA-EA5, Sony a7r5 #1 Mechanical shutter  #2 Electronic shutter  Handheld, 1/500s |
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Sony a7R5, a7c, a6400. a6700 E, A and MD lenses.
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MichelvA
Alpha Eyes group
Knowledge Base Contributor Joined: 26 April 2008 Country: Netherlands Status: Offline Posts: 21069 |
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Posted: 04 May 2025 at 08:27 |
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Love the chicks in #1, but the heron looks great. TFS Mike
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Respect Observe Capture Enjoy
Color management |
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Howard_S
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Joined: 20 March 2008 Country: United Kingdom Location: Oxford Status: Offline Posts: 5924 |
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Posted: 03 May 2025 at 18:40 |
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A great selection! For me nos 1, 7, and 10 standout - the contrast in bokeh in #7 and the chicks in #1, and perhaps #10 being the most satisfying. TFS!
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woodrim
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Joined: 19 October 2009 Country: United States Location: Charleston, SC Status: Offline Posts: 1979 |
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Posted: 03 May 2025 at 16:53 |
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I haven't been here in quite a while. Sorry. Shooting mirror lenses is still a favorite for me.
I took my annual drive to Port Royal, SC, to visit an amazing rookery. Hundreds, if not thousands, of birds nest there. Every local species was represented in numbers. All of these are from ILCE-7M2 and the amazing Minolta Vectis 8/400, using the Monster AF adapter. 1  2  3  4  5  6  7  8  9  10 
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Regards,
woodrim |
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Dopol
Alpha Eyes group
Joined: 17 May 2007 Country: Netherlands Location: Utrecht Status: Offline Posts: 10399 |
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Posted: 09 June 2024 at 11:51 |
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That’s sharp I have to admit.
Amazingly so. |
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 Be yourself; everyone else is already taken
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mariuszlo
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Joined: 17 December 2007 Country: United States Location: Jersey City Status: Offline Posts: 4107 |
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Posted: 08 June 2024 at 20:21 |
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Well, it's not a bird lens. But you can shoot a rabbit
 #1 Almost full frame  #2 100% crop 
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Sony a7R5, a7c, a6400. a6700 E, A and MD lenses.
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Dopol
Alpha Eyes group
Joined: 17 May 2007 Country: Netherlands Location: Utrecht Status: Offline Posts: 10399 |
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Posted: 08 June 2024 at 19:45 |
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The donut effect is funny, but the sharpness seems good.
All shots (except #5) have a close focus point. The high rise is quite sharp, but I don't think it's a real birdwatcher lens.  The donut effect adds to the composition, especially in the last photo. |
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Be yourself; everyone else is already taken
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mariuszlo
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Joined: 17 December 2007 Country: United States Location: Jersey City Status: Offline Posts: 4107 |
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Posted: 08 June 2024 at 18:52 |
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Raymarine
 Sony A7R4, TTArtisan 250/5.6 |
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Sony a7R5, a7c, a6400. a6700 E, A and MD lenses.
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MichelvA wrote:
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