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woodrim View Drop Down
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Posts: 1975 		Direct Link To This Post Posted: 19 January 2022 at 01:42
I have an old man story for you. I'm not sure how long it would have taken me to catch on if I were younger, so I just blame it on aging.

The little blue heron (little is part of its name, not just a size reference) above is the same one that was there a week ago when I took many shots, all failures.

It was an overcast day not like the usual sunny and bright sky we often have here. I saw the little blue and quickly changed my lens to the Vectis mirror. I had been shooting with a fast 50, so adjusted the ISO much higher. When looking through the viewfinder, I saw that my shutter speed was only 1/30. I quickly raised the ISO and found it only improved to 1/50. I looked up to the sky and commented to my shooting mate that it sure is a dim day. I upped the iso again to a level I don't like using and started trying to focus. I was having an unusually difficult time focusing and my images showed it. Then it finally occurred to me to look at the front of the lens. A square Zeiss lens wipe packet that was at the bottom of my bag had been wedged into the front of the mirror lens. With any other type of lens it would have been like a lens cap but mirrors will still show images with only 20% of the mirror unobstructed. Foolish, I felt. Glad the heron showed up again this past weekend.   
Regards,

woodrim
 



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Fred_S View Drop Down
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Posts: 12723 		Direct Link To This Post Posted: 18 January 2022 at 18:54
Originally posted by angora angora wrote:

beautiful!

+1!
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angora View Drop Down
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Posts: 4916 		Direct Link To This Post Posted: 18 January 2022 at 17:11
beautiful!
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Snegren View Drop Down
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Posts: 6157 		Direct Link To This Post Posted: 18 January 2022 at 16:10
Bird friendly climate you have Mike! Another great set with the Vectis!
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woodrim View Drop Down
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Posts: 1975 		Direct Link To This Post Posted: 18 January 2022 at 16:07
Lovely landscape, Michael.

Paul: I'll have an update soon to the report I gave you on the Nikon orange ring.

These from Vectis 8/400
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woodrim
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woodrim View Drop Down
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Posts: 1975 		Direct Link To This Post Posted: 14 January 2022 at 15:59
The big gulp.

The anhinga underwater spearfisher is the most talented of them all. Nikon orange ring 8/500
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woodrim
 



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woodrim View Drop Down
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Posts: 1975 		Direct Link To This Post Posted: 14 January 2022 at 15:53
Originally posted by Howard_S Howard_S wrote:

Well, I did say 'look away now'!


That's when I started paying attention.
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woodrim
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Miranda F View Drop Down
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Posts: 4073 		Direct Link To This Post Posted: 13 January 2022 at 16:22
Originally posted by Snegren Snegren wrote:

It appears the Rubinar MC 4.5/300 contains a 1.3x teleconverter in its optical scheme that can be removed (don't know how) to obtain a 3.5/230 Mirror lens with some vignetting on FF. Neat, right. Not that I'm going to try it, the MC Rubinar's go for like 600 Euro.

Interesting. I have a f5.6 300mm Paragon mirror lens which is quite sharp.
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Micholand View Drop Down
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Posts: 17855 		Direct Link To This Post Posted: 12 January 2022 at 18:17
Originally posted by Fred_S Fred_S wrote:

Not typically mirror, but a great shot Michael!
Well, when there's no edge/spot/highlight in the background, then no donuts

Originally posted by pegelli pegelli wrote:

Originally posted by Micholand Micholand wrote:


"Foggy winter morning"
Nice and moody, great shot indeed!
Thanks Pieter!
/Michael

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Howard_S View Drop Down
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Posts: 4893 		Direct Link To This Post Posted: 12 January 2022 at 09:37
Well, I did say 'look away now'!
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neilt3 View Drop Down
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Posts: 3186 		Direct Link To This Post Posted: 12 January 2022 at 01:47
Originally posted by Howard_S Howard_S wrote:

Thanks for the earlier remarks about dealing with the baffle on the Vectis 400. I had asked because I had looked at the rear of my lens and inspected the baffle, (look away now) put my finger in and the baffle came out with the smallest of tugs. I put it back in but now the manual focus appears not to work, with the lens apparently fixed on infinity.

I'll study the link Woodrim posted, but I'm not confident about making the contacts connect again.

Good while it lasted, but I was planning using it with my S1 at one point.

Ho hum; back to the AF 500.


Do we really need to have a conversation on you being more gentle when your sticking your finger in a hole ?!
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Posts: 4893 		Direct Link To This Post Posted: 12 January 2022 at 00:39
Thanks for the earlier remarks about dealing with the baffle on the Vectis 400. I had asked because I had looked at the rear of my lens and inspected the baffle, (look away now) put my finger in and the baffle came out with the smallest of tugs. I put it back in but now the manual focus appears not to work, with the lens apparently fixed on infinity.

I'll study the link Woodrim posted, but I'm not confident about making the contacts connect again.

Good while it lasted, but I was planning using it with my S1 at one point.

Ho hum; back to the AF 500.
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pegelli View Drop Down
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Posts: 36510 		Direct Link To This Post Posted: 11 January 2022 at 21:10
Originally posted by Micholand Micholand wrote:


"Foggy winter morning"
Nice and moody, great shot indeed!
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Posts: 36510 		Direct Link To This Post Posted: 11 January 2022 at 21:04
Originally posted by Snegren Snegren wrote:

I mean wonki as in distorted lines in the image, not in the viewfinder. Perhaps I have to produce a sample to illustrate.

Hardly ever had a problem with black bands but that is probably because here we generally have a shortage of light while you have an abundance.
Paul, in the silent mode you're limited by the readout speed of the succesive lines of sensor, which is quite long vs. the actual shutter speed. So if you move your camera slightly during the exposure the subject moves slightly and straight edges become wavy or wonky. The total readout readout time of the A7Riv sensor in silent mode is 1/10th of a second uncompressed and 1/20th of a second compressed. The Riii series models are slightly faster but the Rii series even slower. So especially with a long lens you will see the effect of a slight camera movement during this 1/10th or 1/20th of a second. The A9 and A1 are the only ones with a much faster readout speed (< 1/100th sec)

And the black lines people talk about with the silent shutter you only get with electric lamp light when you see the effect of the 50 cycles alternating current. Sunlight is continuous enough not to see this effect

Edited by pegelli - 11 January 2022 at 21:25
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