Lacerta Herschel-LAC2s 2" (T2)

Produktkategori: Produktvarumärke: Lacerta
Lacerta Herschel-LAC2s 2" (T2)

Lacerta Herschel-LAC2s 2" (T2)

  • Lacerta Herschel-LAC2s 2" (T2)
  • Aurinpilkku kuvattuna Lacerta Herschel-prisman avulla. Kaukoputkena TS102 ED linssikaukoputki, ZWO ASI174MM monokamera. Suodattimet ND3 harmaasuodatin, polarisaatiosuodatin & IR UV estosuodatin.
  • Sävytetty mustavalkokuva. Televue Powermate barlowlinssi 2.5x,

Pris 2 759,94kr

LACERTA Herschel-prismor skiljer sig från de andra Herschel-prismorna på marknaden (INTES, LUNT, Scopium etc ...). De möjliggör full polarisering vid Brewster-vinkeln, i motsats till 90-gradersversionerna, som är lättare att tillverka, där endast partiell polarisering är möjlig.

Varför Brewster Angle?

Lacerta Herschel-prismor med Brewster-vinkel har vissa fördelar jämfört med 90 graders prismor: Eftersom polariseringen vid Brewster-vinkeln (57 grader) är nästan komplett, möjliggör Lacerta Herschel-prisman med det obligatoriska ND3-neutraldensitetsfiltret OCH med ett extra polarfilter praktiskt taget full ljusdämpning - i verkligheten ett dimområde mellan ND4.07 och 6.37 - vanligtvis ännu mer. Utan polariserande filter arbetar Herschel-prismat med lägsta ljusdämpning (ND4.07) och kan därmed användas för fotografering. Med de "traditionella" 90 graders Herschel-prismorna ligger detta värde mellan 4,24 och 5,00.

Den visuella perceptionen vid olika neutrala densiteter visas på bilden nedan. Det är lätt att se att granuleringen i traditionella Herschel-prismor endast kan observeras väl med ett extra TREDJE filter (ND3 och polarisationsfilter krävs!). Herschel-prismor med Brewster-vinkel behöver inget extra filter eftersom dimområdet är kontinuerligt möjligt upp till ND6.37!

När använder du 2 "Herschel prismat?

Under 2000 mm brännvidd är 1,25 "prismat tillräckligt, och det sparar fokusbanan som du kan behöva för filteranpassningen. Över 2000 mm brännvidd anges 2" Herschel-kilen, du behöver minst 130 mm fri fokusbana på grund av den extra brännvidden strukturer för filtren Rotationsenheten är lite mer än den för en 2 "stjärnig diagonal.

Hur använder du 2 "Herschel prismat?

  • Först skruvas ND3-filtret in, det monteras direkt i Herschel-prismat (utgång på okularsidan), i den initiala delen av rotationsadaptern. Om du inte har en rotationsadapter skruvas ND3-filtret fast i okularet
  • Därefter skruvas polfiltret in i rotationsadapterns änddel. Har du ett Herschel-prisma utan rotationssystem skruvas även polfiltret fast i okularet. Den totala ljusstyrkan justeras genom att vrida på okularet
  • Observera att de optiska elementen strikt måste ha följande ordning: Teleskop - Herschel-prisma - ND3-filter - polärt filter - extra filter (t.ex. IR-block eller kontrastfilter efter eget val) - okular (eller kamera)
  • Vid byte av okular är det viktigt att se till att alla filter skruvas runt och sätts ihop i rätt ordning. När man använder en rotationsadapter är det mycket lättare att byta okular, då båda filtren skruvas in i rotationsadaptern, ND3 sitter i rotationsadaptern, startdelen och polfiltret i den roterbara änddelen. I så fall (och endast i så fall) kan okularet helt enkelt bytas!

Varför är Lacerta Herschel-prismat öppet i botten?

  • Den öppna designen möjliggör mycket bättre ventilation än andra Herschel-kilar på marknaden
  • Den del av det spridda ljuset som kommer genom öppningen försvinner från teleskopet mot solen
  • Inga skor kommer att fatta eld eftersom inget ljus kommer ut genom öppningen

OBS! Detta är T2-modellen!

Tillgänglighet
Finns i lager

Ljusväg:

  • 2" version: 81mm från M48 till M54 ("S"version med rotationsadapter ca 106mm)

Vikt:

  • 2" version: 685g
Din kundvagn är tom

Villkor

These terms and conditions are valid from November 7th, 2020.

Contact information

Astro Art Finland
Sinirinnankatu 18
FI-50190 Mikkeli
FINLAND

Telephone: +358442778923
Email: info@astroart-store.com
VAT Number: FI32234856

Products are sold for private customers over 18 years of age. Prices include VAT. The prices are subject to change.

Ordering

Products on the online store are ordered by adding them to the shopping cart and by paying them with an online checkout service. All customer information is handled confidentially. Contact information collected during the order process is only used for the delivery of the order, unless otherwise stated. When placing an order you are required to accept the terms and conditions.

Payment and payment methods

The online checkout service in use is Paytrail. The payment methods are invoice, installment payment, card payment and payment via online bank.

By filling your personal information at the checkout you accept the terms and conditions of Paytrail Oyj
(Paytrail Oyj, Innova 2, Lutakonaukio 7, 40100 Jyväskylä). By clicking "buy" you accept the terms and conditions of Astro Art Store.

Order and payment confirmation

After we have received your order we will immediately send you an order confirmation that contains your order information. Always check the content of the order confirmation. If you have questions regarding your order, contact our customer service immediately. Keep the order confirmation in case you need to contact our customer service. Make sure that you have your customer number and order number available when contacting our customer service. Always make sure that the package contents matches the order confirmation.

You can use the following information to contact our customer service:

Astro Art Finland
Sinirinnankatu 18
FI-50190 Mikkeli
FINLAND

Telephone: +358442778923
Email: info@astroart-store.com
VAT Number: FI32234856

Shipping methods and fees

Shipping fees include shipping and packaging fees. We will present an estimate of the shipping fees in the shopping cart. The exact shipping fees are visible when you have chosen your preferred payment method and shipping method for your order. The available shipping methods vary depending on the products and the combined weight of the products in the shopping cart. 

Delivery time

Our most common delivery times to Finland vary depending on the product and delivery method in question. Exceptions to delivery times are stated. We will notify you about the possible delays right after your order.

We are not responsible for delays caused by force majeure or indirect losses caused by delays. The online store will inform about exceptional delivery times on the website.

Warranty

All of our products have at least a 1-year warranty by the manufacturer. Warranty-related issues can be dealt either directly with the manufacturer or with Astro Art Store. 

Warranty does not apply to faults that have been caused by:

a) incorrect maintenance, lack of maintenance, or lack of calibration

b) software, parts, or equipment that have not been delivered by Astro Art Store

c) unauthorized modifications or misuse of the product

Return conditions

You have the right to cancel this agreement within 14 days without declaring the reason. The deadline for canceling this agreement ends 14 days after you have received the last shipment of your order. If the product is downloaded, the deadline for canceling this agreement is 14 days after you have downloaded the product.

To use your right to cancel, you need to send us an unambiguous notification of your decision (for example by phone or by email). You can also use our printable return form, but it is not required. To comply with the 14-day deadline you need to send the notification before the deadline.

Use the following contact information to send the notification:

Astro Art Finland
Sinirinnankatu 18
FI-50190 Mikkeli
FINLAND

Telephone: +358442778923
Email: info@astroart-store.com
VAT Number: FI32234856

Effects of canceling your order

If you decide to cancel this agreement, we will return your payment in full, including the shipping costs (only the amount of the cheapest available shipping method). The payment will be returned without a delay, and within 14 days after you have received the cancellation confirmation.

Return fees are on the responsibility of the customer. The items must be returned to the address of Astro Art Finland with the same method as they have been delivered to the customer. 

We will return the payment by using the same payment method as the original payment, unless both parties agree otherwise. The payment is returned in a way that the you will not get any extra fees.

You must send the items back without a delay and within 7 days of receiving the cancellation confirmation. The deadline has been complied with, if you send the items back before the 7-day deadline.

You are only responsible for such decrease in value of the items that is not caused by handling that necessary to test for operation, features, or functionality of the items.

Unredeemed package

Failure to redeem your delivery is not the same as returning or canceling your order. We will charge a fee for unredeemed orders that have not been canceled according to return conditions.

Problematic situations

If the item has been lost or damaged during delivery or it does not correspond to your order, you need to use our contact information to inform us within 14 days by mail, email or by phone. The contact information can be found in "Return conditions". If the package has clearly been damaged during shipping, you need to inform the delivery company immediately.