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Sal70400g lens haze or ?

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Post Options Post Options   Quote arrow34 Quote  Post ReplyReply Direct Link To This Post Topic: Sal70400g lens haze or ?
    Posted: 06 February 2023 at 20:34
Hi all,

Just got in a cosmetically excellent sal70400g... It focuses great and takes clear pics... But, I just noticed under light what looks like haze or something on the inside of the front element. Would appreciate opinions on what it is and if I should just send it back.



Edited by arrow34 - 06 February 2023 at 23:13
Sony A7RIV, A99II, Sony 24-70SAL2470Z, Sony 70-200 f2.8, Minolta 17-35, 24-50 f4, 28 f2, 50 f1.4, 35-105, 28-105, 70-210, 100-200, 100-300. Samyang 35 1.4, reflex 500
 



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Post Options Post Options   Quote arrow34 Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2023 at 20:35
Sony A7RIV, A99II, Sony 24-70SAL2470Z, Sony 70-200 f2.8, Minolta 17-35, 24-50 f4, 28 f2, 50 f1.4, 35-105, 28-105, 70-210, 100-200, 100-300. Samyang 35 1.4, reflex 500
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Post Options Post Options   Quote 4paul Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2023 at 22:02
It doesn't wipe off? It looks to me like condensation that has dried, although it also looks like White Spot Disease on my old M-mount 28/2.8 (frowny face) ... it's probably not noticeable, except at f16 with the sky in the frame ... you should check if it has an effect on veiling haze: shoot without a hood so sun is on the spots (the same angle you're holding the LED in this picture) and see if it goes white with low contrast.

Keep it if you never shoot at f16 or without a hood pointed toward the sun. I checked mine, and it doesn't have anything like that. I'm a big fan of the 70mm wide end, so I would keep it for that.
There is a difference between a shaky or out-of-focus photograph and a snapshot of clouds and fog banks. - Schrödinger
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Post Options Post Options   Quote arrow34 Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2023 at 22:17
It is on the inside :( It doesnt seem noticeable on the shots i have take, let me try a shot at the sun at f16 and see. I have a SAL70200g that i love using, but I wanted more reach for a cruise. I am still on the fence. I am afraid it might get worse. i wonder if it can get it open and try to clean it... I only paid $550 for it.



Camera     Sony ILCE-7RM4
Lens     Sony 70-400mm F4-5.6 G SSM (SAL70400G)
Focal Length     400.0 mm (400.0 mm in 35mm)
Aperture     f/7.1
Exposure Time     0.0025s (1/400)
ISO     250

Edited by arrow34 - 06 February 2023 at 23:02
Sony A7RIV, A99II, Sony 24-70SAL2470Z, Sony 70-200 f2.8, Minolta 17-35, 24-50 f4, 28 f2, 50 f1.4, 35-105, 28-105, 70-210, 100-200, 100-300. Samyang 35 1.4, reflex 500
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Post Options Post Options   Quote arrow34 Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2023 at 00:11
opened the lens... cant clean it, it is in the front element. So it is balsam separation
Sony A7RIV, A99II, Sony 24-70SAL2470Z, Sony 70-200 f2.8, Minolta 17-35, 24-50 f4, 28 f2, 50 f1.4, 35-105, 28-105, 70-210, 100-200, 100-300. Samyang 35 1.4, reflex 500
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Post Options Post Options   Quote dxqcanada Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2023 at 00:13
It is not haze. Could be fungus.
You should take it apart and clean that side of the element ... though it may not be possible to get to that first element if the assembly is encase ... hopefully it is could be on the last element in the group.

Sony A77mII, A57, Nex-6 | Minolta Maxxum 9000, Autocord
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Post Options Post Options   Quote Hezu Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2023 at 14:38
Originally posted by arrow34 arrow34 wrote:

It is on the inside :( It doesnt seem noticeable on the shots i have take, let me try a shot at the sun at f16 and see. I have a SAL70200g that i love using, but I wanted more reach for a cruise. I am still on the fence. I am afraid it might get worse. i wonder if it can get it open and try to clean it... I only paid $550 for it.
Since you only recently bought it, if there is any return policy, I would seriously consider returning this, especially if the seller didn't even mention this before you bought it.
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Post Options Post Options   Quote arrow34 Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2023 at 18:05
Yeah, I thankfully bought it from mpb.com and they have a 14 day return policy. They said it was in excellent condition. Which physically it is, but i am not going to keep this and i already sent an email about returning the lens. Bummed, as it was 1 a good price 2 a great lens.
Sony A7RIV, A99II, Sony 24-70SAL2470Z, Sony 70-200 f2.8, Minolta 17-35, 24-50 f4, 28 f2, 50 f1.4, 35-105, 28-105, 70-210, 100-200, 100-300. Samyang 35 1.4, reflex 500
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Post Options Post Options   Quote MinoltaMad Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2023 at 13:34
It's the UV cement they use these days to put elements together going funky and causing some mischief. That lens, has from memory, three elements sandwiched together in the black plastic holder. I've seen a few Sony lenses from that vintage go like that - version 1 of 70-200 and 70-400 and one of the shorter zooms. If you can cope with having it , the issues doesn't really upset your shots - it's nowhere near as troublesome as fungus or dust image wise. I see you've asked for a return but your pics are sharp with no issues. The cement is see through in the first place and yes, the bubbles will potentially compromise - I'd be surprised if you used that lens over f11; any larger aperture at zoom you won't see any of that. It's not really going to get any worse - it seems to get to a point and then jut stop.
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Post Options Post Options   Quote arrow34 Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2023 at 18:15
Thanks for the info! I figured it might be some sort of cement issue. I am going to return it and just get another lens. I was tempted to keep it, but this issue would make it nearly impossible to resell the lens later. Even at $540ish, which is a killer price for this lens. I am thinking spending more on a newer lens that has stabilization and maybe a bit more reach. maybe the tamron 150-500. I can get it for around $955. I dont want to spend that much, but i am going to watch the prices on used lenses for a few months and make a decision.
Sony A7RIV, A99II, Sony 24-70SAL2470Z, Sony 70-200 f2.8, Minolta 17-35, 24-50 f4, 28 f2, 50 f1.4, 35-105, 28-105, 70-210, 100-200, 100-300. Samyang 35 1.4, reflex 500
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