What are these red and purple lines?

**Kerrowdown** · 06-12-2016, 01:40 AM - **1 Like**

Originally posted by bessa-66

Aaah, but you're not a glass tube!

I've been called the last word there on occasion.

stevebrot · 06-12-2016, 10:25 AM

Originally posted by bessa-66

Not so with the 300... it does stick when I press it down off the camera- is there any chance that this can be fixed with a little oil or something?

I would hold off on the oil. It is probable that something inside is bent and jamming. It is probably fixable, but some disassembly would be required.

Steve

**Quartermaster James** · 06-12-2016, 11:08 AM

Originally posted by stevebrot

I would hold off on the oil. It is probable that something inside is bent and jamming. It is probably fixable, but some disassembly would be required.

Steve

^^^^ What he said.

In your adventures into amateur lens repairs, you get to ruin* one lens by oiling the blades. It's the price of experience. Choose this lens wisely.

*okay, it's not permanently ruined, but it takes a lot of cleaning to recover. There's a reason "no oil on the blades" is often included in descriptions of used lenses.
---
Contact Eric Hendrickson http://www.pentaxs.com/ if you are interested in having it serviced.

bessa-66 · 06-12-2016, 03:46 PM

Originally posted by Quartermaster James

^^^^ What he said.

In your adventures into amateur lens repairs, you get to ruin* one lens by oiling the blades. It's the price of experience. Choose this lens wisely.

*okay, it's not permanently ruined, but it takes a lot of cleaning to recover. There's a reason "no oil on the blades" is often included in descriptions of used lenses.
---
Contact Eric Hendrickson Home if you are interested in having it serviced.

Haha yes, lens DIY can be risky! I declicked an old lens once completely by accident.... Lucky it only cost me $5! 😂😂

**Schraubstock** · 06-12-2016, 09:38 PM

Analogy: You are trying to merry an 90 year old man to a 20 something woman. Nice, but...

Isn't it time to lower this old man, err lens into the grave ?

RIP

**Quartermaster James** · 06-12-2016, 10:43 PM

Originally posted by Schraubstock

Analogy: You are trying to merry an 90 year old man to a 20 something woman. Nice, but...

Isn't it time to lower this old man, err lens into the grave ?

RIP

I don't know about that. My M42 300mm f4 works just fine, and it's got to be older.

bessa-66 · 06-12-2016, 10:57 PM

Originally posted by Schraubstock

Analogy: You are trying to merry an 90 year old man to a 20 something woman. Nice, but...

Isn't it time to lower this old man, err lens into the grave ?

RIP

Perhaps, but it's the only one I could afford! Works fine when the sun is low, on an overcast day and the planet's are aligned! What is the new Pentax equivalent?

**Quartermaster James** · 06-12-2016, 11:20 PM

Originally posted by bessa-66

Perhaps, but it's the only one I could afford! Works fine when the sun is low, on an overcast day and the planet's are aligned! What is the new Pentax equivalent?

SMC Pentax-DA* 300mm F4 ED [IF] SDM Reviews - DA Prime Lenses - Pentax Lens Reviews & Lens Database

bessa-66 · 06-12-2016, 11:55 PM

Originally posted by Quartermaster James

SMC Pentax-DA* 300mm F4 ED [IF] SDM Reviews - DA Prime Lenses - Pentax Lens Reviews & Lens Database

Seems like a great lens for the money! Is there a third party equivalent like sigma or tamron?

**Schraubstock** · 06-13-2016, 12:24 AM

Originally posted by Quartermaster James

I don't know about that. My M42 300mm f4 works just fine, and it's got to be older.

It was said in jest

bessa-66 · 06-13-2016, 04:45 AM

Originally posted by Schraubstock

It was said in jest

It a all good! 😊😄

elvinhaak · 06-13-2016, 07:22 AM

Originally posted by bessa-66

Hi Elvinhaak, this lens has no A setting on the ring at all

Of course not, but the body might just 'think' that your lens is in the 'A'-setting because the lens is powdered or making a bad contact with the 'A'-contact on the body.

The system the body notices is simple: if there is a contact present between the 'A'-contact on the body and 'earth' there is a non-'A'-lens on the body or the lens is set to another aperture then 'A'.
If there is no contact on the 'A'-contact, the body knows that the lens is set to an 'A' so that the body controls the aperture.

So: if you don't have a good contact between the lens and the body, the body calculates that your lens is an older 'A'-lens and thus would try to set the aperture itself .Since it cannot connect digitally to the lens, it stays open.

I have experience with this ... had to sand my lens to make contact on the 'A'-contact and the problem was solved.

**Quartermaster James** · 06-13-2016, 07:23 AM

Originally posted by Schraubstock

It was said in jest

Ach! Sorry! Color me dull!

---------- Post added Jun 13th, 2016 at 06:26 AM ----------

Originally posted by bessa-66

Seems like a great lens for the money! Is there a third party equivalent like sigma or tamron?

If you're open to a zoom, give this a look: HD Pentax-DA 55-300mm F4-5.8 ED WR Reviews - DA Zoom Lenses - Pentax Lens Reviews & Lens Database

stevebrot · 06-13-2016, 08:22 AM

Originally posted by elvinhaak

The system the body notices is simple: if there is a contact present between the 'A'-contact on the body and 'earth' there is a non-'A'-lens on the body or the lens is set to another aperture then 'A'.
If there is no contact on the 'A'-contact, the body knows that the lens is set to an 'A' so that the body controls the aperture.

Other way around for the "A" contact. What you are describing is related to the "data" pin*. The camera will test for continuity between that pin on the body and the lens mount as a means of telling whether a lens is mounted and will gate some functions based on the result.

Steve

* The "A" pin is at position #3, while the "data" or "digital contact information" pin is at position #7 See article HERE

bessa-66 · 06-13-2016, 03:11 PM

Does the 300mm give a 400mm field of view on the Kx even though it's a DA digital lens?

06-12-2016, 11:08 AM	#18
Quartermaster James Loyal Site Supporter Join Date: Oct 2014 Location: Anchorage, Alaska Posts: 653	Originally posted by stevebrot I would hold off on the oil. It is probable that something inside is bent and jamming. It is probably fixable, but some disassembly would be required. Steve ^^^^ What he said. In your adventures into amateur lens repairs, you get to ruin* one lens by oiling the blades. It's the price of experience. Choose this lens wisely. okay, it's not permanently ruined, but it takes a lot of cleaning to recover. There's a reason "no oil on the blades" is often included in descriptions of used lenses. --- Contact Eric Hendrickson http://www.pentaxs.com/ if you are interested in having it serviced. Last edited by Quartermaster James; 06-12-2016 at 11:12 AM. Reason: Added info*

06-13-2016, 08:22 AM	#29
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by elvinhaak The system the body notices is simple: if there is a contact present between the 'A'-contact on the body and 'earth' there is a non-'A'-lens on the body or the lens is set to another aperture then 'A'. If there is no contact on the 'A'-contact, the body knows that the lens is set to an 'A' so that the body controls the aperture. Other way around for the "A" contact. What you are describing is related to the "data" pin. The camera will test for continuity between that pin on the body and the lens mount as a means of telling whether a lens is mounted and will gate some functions based on the result. Steve The "A" pin is at position #3, while the "data" or "digital contact information" pin is at position #7 See article HERE Last edited by stevebrot; 06-13-2016 at 08:36 AM.

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06-12-2016, 01:40 AM - 1 Like	#16
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,819	Originally posted by bessa-66 Aaah, but you're not a glass tube! I've been called the last word there on occasion.

06-12-2016, 10:25 AM	#17
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by bessa-66 Not so with the 300... it does stick when I press it down off the camera- is there any chance that this can be fixed with a little oil or something? I would hold off on the oil. It is probable that something inside is bent and jamming. It is probably fixable, but some disassembly would be required. Steve

06-12-2016, 03:46 PM	#19
bessa-66 Senior Member Join Date: Dec 2015 Posts: 137 Original Poster	Originally posted by Quartermaster James ^^^^ What he said. In your adventures into amateur lens repairs, you get to ruin* one lens by oiling the blades. It's the price of experience. Choose this lens wisely. *okay, it's not permanently ruined, but it takes a lot of cleaning to recover. There's a reason "no oil on the blades" is often included in descriptions of used lenses. --- Contact Eric Hendrickson Home if you are interested in having it serviced. Haha yes, lens DIY can be risky! I declicked an old lens once completely by accident.... Lucky it only cost me $5! 😂😂

06-12-2016, 09:38 PM	#20
Schraubstock Site Supporter Join Date: Oct 2010 Location: Melbourne Photos: Gallery Posts: 3,386	Analogy: You are trying to merry an 90 year old man to a 20 something woman. Nice, but... Isn't it time to lower this old man, err lens into the grave ? RIP

06-12-2016, 10:43 PM	#21
Quartermaster James Loyal Site Supporter Join Date: Oct 2014 Location: Anchorage, Alaska Posts: 653	Originally posted by Schraubstock Analogy: You are trying to merry an 90 year old man to a 20 something woman. Nice, but... Isn't it time to lower this old man, err lens into the grave ? RIP I don't know about that. My M42 300mm f4 works just fine, and it's got to be older.

06-12-2016, 10:57 PM	#22
bessa-66 Senior Member Join Date: Dec 2015 Posts: 137 Original Poster	Originally posted by Schraubstock Analogy: You are trying to merry an 90 year old man to a 20 something woman. Nice, but... Isn't it time to lower this old man, err lens into the grave ? RIP Perhaps, but it's the only one I could afford! Works fine when the sun is low, on an overcast day and the planet's are aligned! What is the new Pentax equivalent?

06-12-2016, 11:20 PM	#23
Quartermaster James Loyal Site Supporter Join Date: Oct 2014 Location: Anchorage, Alaska Posts: 653	Originally posted by bessa-66 Perhaps, but it's the only one I could afford! Works fine when the sun is low, on an overcast day and the planet's are aligned! What is the new Pentax equivalent? SMC Pentax-DA* 300mm F4 ED [IF] SDM Reviews - DA Prime Lenses - Pentax Lens Reviews & Lens Database

06-12-2016, 11:55 PM	#24
bessa-66 Senior Member Join Date: Dec 2015 Posts: 137 Original Poster	Originally posted by Quartermaster James SMC Pentax-DA* 300mm F4 ED [IF] SDM Reviews - DA Prime Lenses - Pentax Lens Reviews & Lens Database Seems like a great lens for the money! Is there a third party equivalent like sigma or tamron?

06-13-2016, 12:24 AM	#25
Schraubstock Site Supporter Join Date: Oct 2010 Location: Melbourne Photos: Gallery Posts: 3,386	Originally posted by Quartermaster James I don't know about that. My M42 300mm f4 works just fine, and it's got to be older. It was said in jest

06-13-2016, 04:45 AM	#26
bessa-66 Senior Member Join Date: Dec 2015 Posts: 137 Original Poster	Originally posted by Schraubstock It was said in jest It a all good! 😊😄

06-13-2016, 07:22 AM	#27
elvinhaak Junior Member Join Date: Apr 2016 Posts: 33	Originally posted by bessa-66 Hi Elvinhaak, this lens has no A setting on the ring at all Of course not, but the body might just 'think' that your lens is in the 'A'-setting because the lens is powdered or making a bad contact with the 'A'-contact on the body. The system the body notices is simple: if there is a contact present between the 'A'-contact on the body and 'earth' there is a non-'A'-lens on the body or the lens is set to another aperture then 'A'. If there is no contact on the 'A'-contact, the body knows that the lens is set to an 'A' so that the body controls the aperture. So: if you don't have a good contact between the lens and the body, the body calculates that your lens is an older 'A'-lens and thus would try to set the aperture itself .Since it cannot connect digitally to the lens, it stays open. I have experience with this ... had to sand my lens to make contact on the 'A'-contact and the problem was solved.

06-13-2016, 07:23 AM	#28
Quartermaster James Loyal Site Supporter Join Date: Oct 2014 Location: Anchorage, Alaska Posts: 653	Originally posted by Schraubstock It was said in jest Ach! Sorry! Color me dull! ---------- Post added Jun 13th, 2016 at 06:26 AM ---------- Originally posted by bessa-66 Seems like a great lens for the money! Is there a third party equivalent like sigma or tamron? If you're open to a zoom, give this a look: HD Pentax-DA 55-300mm F4-5.8 ED WR Reviews - DA Zoom Lenses - Pentax Lens Reviews & Lens Database

06-13-2016, 03:11 PM	#30
bessa-66 Senior Member Join Date: Dec 2015 Posts: 137 Original Poster	Does the 300mm give a 400mm field of view on the Kx even though it's a DA digital lens?