D810 not Auto focusing when using dx lens?

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355
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Andy
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I've sold an 18-55 kit lens from my d3300 camera I used to have.
The person on ebay has connected this to their d810 and its not Autofocusing for some reason

Now I know the d810 is a full frame and the lens is a dx lens.
Would this stop the auto focus?
It did work perfectly prior to sale and it was bubble wrapped to the point it could have been used as a football, so damage in transit is highly unlikely.

Ive suggested cleaning contacts.
Checking af switch
Re mounting it.
Checking apeture changes (it does)
Checking af switch on camera.

If the focus point is set outside of the cameras viewfinder would this prevent Autofocusing? Or would it automatically centre?

Many thanks for any help.
Andy
 
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Andy
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Hello, I've asked on a forum for any advice... Im waiting for a response now to help, but a few things to check (sorry some are obvious, but I'd rather be thorough)
Is the lenses switch set to af? And have you tried switching between af and manual and back to af?
Is the cameras switch set to af and not manual?
Have you tried remounting the lens and cleaning contacts? (although I am sure they are clean)
Have you tried focusing in live view and through the viewfinder?
Is your autofocus point in the centre of the lens?
I know the d810 is a full frame camera, and the lens is a dx crop sensor lens, as a result of this the d810 drops into crop sensor mode. Is it possible that the focus point is outside of the 'crop sensor' range?
When you look through the viewfinder of your d810 you have a small dot on the bottom left hand corner, and 2 arrows which indicates near or far focus.
Is this adjusting accordingly when you are manually focusing the lens?
Was there any damage on the box when you received it? (I did try to package it really well to prevent any damage)
Since trying the 18-55 on your camera has your camera since been auto focusing with your other lenses?
 
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Andy
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Is it possible the d810 is set to back button focussing and the owner isn't aware so nothing is happening when depressing the shutter release? Is it autofocussing with other lenses? I made exactly that mistake when I bought a used lens recently.
I thought this, they said it focuses with their other lens. But I'm wondering if they've got AFL set on and not realising... I've since asked them to try their other lenses to make sure they still work.
They also said they've had the body for 2 years.

I also thought if their using the 51 point af system or the 3d system are the focus points out of the cropped size... Which would explain why it isn't working?
Ive asked them to change to single point af to eliminate this.
 
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1,224
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Martin
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Makes one wonder why anyone would buy a DX lens to go on a FX camera in the first place but hopefully they have fixed it now.
 
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6,995
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Bazza
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Just taken my DX lens off my D300 and put onto my D810. Lens is 12-24mm one and it auto focuses ok both on the back button and the trigger button. Sounds as if the settings are wrong in the menu
 
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Steve
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With my cynical head on - it's prettier than my normal head - I wonder if the buyer didn't fully realise that your lens was DX and is looking for an excuse to return it for a refund?
 
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Andy
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With my cynical head on - it's prettier than my normal head - I wonder if the buyer didn't fully realise that your lens was DX and is looking for an excuse to return it for a refund?
I thought this originally and I did re read my listing and it clearly states its a dx lens and not compatible with fx cameras.
Now they have contacted today and said that they've took the lens to a specialist in Manchester, who has confirmed the af isn't working and said they are going to get a quote, but my want to return the lens.

Ive just said I'm more than happy to refund once I confirm serial numbers on the lens match when I get it returned.

Part of me feels like the perfectly good lens I sent out will come back as a different lens!
 
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6,995
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Bazza
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DX lenses are compatible with FX cameras. if set up properly the FX area gets greyed out just leaving the DX area clear
 

TCR4x4

Wishes he had a couple more Inches
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8,568
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Tom
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Why would they get it fixed, it would be cheaper to buy a new lens surely.
I’d tell them either send it back as is, and you’ll refund it, presuming it’s the same lens, or nothing.

Dont let them “get it fixed” and send you the bill, anyone can make a fake invoice or they might even know someone in a legit store and get them to make one..
 
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Andy
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Why would they get it fixed, it would be cheaper to buy a new lens surely.
I’d tell them either send it back as is, and you’ll refund it, presuming it’s the same lens, or nothing.

Dont let them “get it fixed” and send you the bill, anyone can make a fake invoice or they might even know someone in a legit store and get them to make one..
I am very sceptical at the moment and I'm 99% sure the lens works.
It was wrapped in bubble wrap to around the size of a small size football.
It was then boxed. It could have been kicked and still not break. If they do choose to get the lens "fixed" then that's on them but they will have them left a message chain stating they have tampered with the lens after I have agreed to accept a return.
 
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Rob
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I thought this originally and I did re read my listing and it clearly states its a dx lens and not compatible with fx cameras.
Now they have contacted today and said that they've took the lens to a specialist in Manchester, who has confirmed the af isn't working and said they are going to get a quote, but my want to return the lens.

Ive just said I'm more than happy to refund once I confirm serial numbers on the lens match when I get it returned.

Part of me feels like the perfectly good lens I sent out will come back as a different lens!
A specialist camera repairer wouldn’t give a quote as it wouldn’t be an economical repair. They would know it’s not worth their time even quoting for it! Get the lens returned and refund. There is no point in repairing a lens like that. Why would anyone think it was the way to go unless they were up to something else.

How much did they buy it for? Surely it wasn’t more than £50 for a 18-55mm DX lens. This all sounds like they will come back to say they want a refund but also keep the lens as it’s ‘faulty with an expensive repair with costly return postage so no point returning to you’. The problem will be you will also need to cover return postage.

This is exactly the reason why I haven’t sold any camera kit on eBay.
 
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3,375
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Steve
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Personally, I would insist they return the lens and make it clear I would not pay for a repair no matter what. I would also tell them the serial number of the lens that I expect to receive back so they know they can't fob me off with something else.

As realspeed says above, there's no reason that a DX lens won't AF on an FX body - even without making any settings changes.
 
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