Pentax D-FA 100mm Macro - problem?
Posted 26/05/2010 - 22:37
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K-3, a macro lens and a DA*300mm...
Posted 26/05/2010 - 22:38
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Thanks Dan.
Panic over!
Can't wait for camera to arrive! Had to be content with walking round the house looking through the lens!
Panic over!
Can't wait for camera to arrive! Had to be content with walking round the house looking through the lens!
If you can't say something nice about Pentax, you won't say anything at all.
Apparently.
Apparently.
Posted 26/05/2010 - 22:41
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robbie_d wrote:
Can't wait for camera to arrive! Had to be content with walking round the house looking through the lens!
LOL
Can't wait for camera to arrive! Had to be content with walking round the house looking through the lens!
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Posted 26/05/2010 - 22:44
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robbie_d wrote:
Can't wait for camera to arrive! Had to be content with walking round the house looking through the lens!
Not quite the same, is it? Can't wait for camera to arrive! Had to be content with walking round the house looking through the lens!
I think the way the way the focus ring keeps moving is something to do with the quick-shift, but I could be wrong.
Dan
K-3, a macro lens and a DA*300mm...
Posted 26/05/2010 - 23:16
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Daniel Bridge wrote:
I think the way the way the focus ring keeps moving is something to do with the quick-shift, but I could be wrong.
From what I know it only does that with lenses where the focus ring does not turn when using auto-focus, the DA*50-135 is for example also such a lens maybe your DA*300 as well?
I think the way the way the focus ring keeps moving is something to do with the quick-shift, but I could be wrong.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 27/05/2010 - 03:21
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Anvh wrote:
From what I know it only does that with lenses where the focus ring does not turn when using auto-focus, the DA*50-135 is for example also such a lens maybe your DA*300 as well?
It's because of quickshift - none of the QS lenses have their focus rings turn during AF, so what you said is also correct From what I know it only does that with lenses where the focus ring does not turn when using auto-focus, the DA*50-135 is for example also such a lens maybe your DA*300 as well?
Basically (and I'm cribbing from that other thread here!) with QS lenses the focus ring is not actually directly connected to the lens elements. Instead it turns them via a clutch as intermediary (the same reason AF doesn't turn the focus ring - the AF motor has no physical connection to the focus ring). When the lens reaches one of the focus limits the clutch disconnects and so the focus ring can keep turning (whereas it wouldn't, for example, on an FA or DA-L lens if I understand this right).
Posted 27/05/2010 - 08:14
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pink wrote:
I wonder where the sd card is going
I saw your reply and couldn't stop smiling even at 5.30am
James
It's inserting the batteries that have be worriedI wonder where the sd card is going
I saw your reply and couldn't stop smiling even at 5.30am
James
My Samsung 100mm does the same, it's the quickshift.
Cheers, HG
K110+DA40, K200+DA35, K3 and a bag of lenses, bodies and other bits.
Mustn't forget the Zenits, or folders, or...
PPG entries.
K110+DA40, K200+DA35, K3 and a bag of lenses, bodies and other bits.
Mustn't forget the Zenits, or folders, or...
PPG entries.
Posted 27/05/2010 - 08:29
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Much like buying toothpaste before buying the toothbrush but I cannot fault your judgement.
The lens is magic. Look forward to seeing your macro attempts. I warn you that it is as adictive as it is frustrating.
regards Thoramay
The lens is magic. Look forward to seeing your macro attempts. I warn you that it is as adictive as it is frustrating.
regards Thoramay
Posted 27/05/2010 - 15:31
Link
MrCynical wrote:
Basically (and I'm cribbing from that other thread here!) with QS lenses the focus ring is not actually directly connected to the lens elements. Instead it turns them via a clutch as intermediary (the same reason AF doesn't turn the focus ring - the AF motor has no physical connection to the focus ring). When the lens reaches one of the focus limits the clutch disconnects and so the focus ring can keep turning (whereas it wouldn't, for example, on an FA or DA-L lens if I understand this right).
Sorry David that isn't fully correct.Anvh wrote:
From what I know it only does that with lenses where the focus ring does not turn when using auto-focus, the DA*50-135 is for example also such a lens maybe your DA*300 as well?
It's because of quickshift - none of the QS lenses have their focus rings turn during AF, so what you said is also correct From what I know it only does that with lenses where the focus ring does not turn when using auto-focus, the DA*50-135 is for example also such a lens maybe your DA*300 as well?
Basically (and I'm cribbing from that other thread here!) with QS lenses the focus ring is not actually directly connected to the lens elements. Instead it turns them via a clutch as intermediary (the same reason AF doesn't turn the focus ring - the AF motor has no physical connection to the focus ring). When the lens reaches one of the focus limits the clutch disconnects and so the focus ring can keep turning (whereas it wouldn't, for example, on an FA or DA-L lens if I understand this right).
You've the DA 18-55 Mark II and that one has quickshift but it doesn't have a slipping focus ring.
I've the DA40 that also doesn't have a slipping focus ring and I've seen the DA70 doesn't do it either.
It's also logical that the focus ring turn during auto-focus because the focus distances are marked on the ring so if they didn't turn the focus wouldn't match up
The DFA100 has a little window where the focus distance is shown, the same is true with the DA*50-135 and since I have that lens I can confirm it slips.
These lens also have a window for focus distance so I suspect they also slip; DA14, DA*16-50, DA*60-250, DA*55, DA*200, DA*300 & DFA 50 Macro.
The rest of the lenses have focus distance on the focus ring so I don't think they slip.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
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1569 posts
17 years
Victory Mansions
It is possible to turn the focus ring on the lens beyond the point where the lens is fully extended, similarly when the lens is fully retracted. The movement of the focus ring become stiffer and less "even". Is this normal, or something I should be worried about?
Haven't tried it on camera yet as I'm waiting for my K20d to be delivered.
Apparently.